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  • Multiple Row Selection in UIPickerView

    - by medma
    hi frends, Today I have a problem related to uipicker. I want to select multiple rows in picker, so I have an idea to show my data in a table and add this table as subview to picker. I have tried a lot but didn't succeed. Please help if u can?? Thanx Ankit

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  • UIPickerview is not visible in additionally added view

    - by MaheshBabu
    Hi folks, i created an additional IBOutlet UIView. at the same time i place the IBOutlet UIPicker view in additional view. Give connections and add Addtional view as subview to main view. As [self.view addsubview:addtionalview]; I write this code in one button click event. Unfortunatly i got additional view in button click but it did n't show UIPicker. whats the wrong. I already have Two UIPicker view in main view. How can i add UIPicker view in added view. Thank u in advnace.

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  • Objective-C NSMutableArray Count Causes EXC_BAD_ACCESS

    - by JoshEH
    I've been stuck on this for days and each time I come back to it I keep making my code more and more confusing to myself, lol. Here's what I'm trying to do. I have table list of charges, I tap on one and brings up a model view with charge details. Now when the model is presented a object is created to fetch a XML list of users and parses it and returns a NSMutableArray via a custom delegate. I then have a button that presents a picker popover, when the popover view is called the user array is used in an initWithArray call to the popover view. I know the data in the array is right, but when [pickerUsers count] is called I get an EXC_BAD_ACCESS. I assume it's a memory/ownership issue but nothing seems to help. Any help would be appreciated. Relevant code snippets: Charge Popover (Charge details model view): @interface ChargePopoverViewController ..... NSMutableArray *pickerUserList; @property (nonatomic, retain) NSMutableArray *pickerUserList; @implementation ChargePopoverViewController @synthesize whoOwesPickerButton, pickerUserList; - (void)viewDidLoad { JEHWebAPIPickerUsers *fetcher = [[JEHWebAPIPickerUsers alloc] init]; fetcher.delegate = self; [fetcher fetchUsers]; } -(void) JEHWebAPIFetchedUsers:(NSMutableArray *)theData { [pickerUserList release]; pickerUserList = theData; } - (void) pickWhoPaid: (id) sender { UserPickerViewController* content = [[UserPickerViewController alloc] initWithArray:pickerUserList]; UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:content]; [popover presentPopoverFromRect:whoPaidPickerButton.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionAny animated:YES]; content.delegate = self; } User Picker View Controller @interface UserPickerViewController ..... NSMutableArray *pickerUsers; @property(nonatomic, retain) NSMutableArray *pickerUsers; @implementation UserPickerViewController @synthesize pickerUsers; -(UserPickerViewController*) initWithArray:(NSMutableArray *)theUsers { self = [super init]; if ( self ) { self.pickerUsers = theUsers; } return self; } - (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { // Dies Here EXC_BAD_ACCESS, but NSLog(@"The content of array is%@",pickerUsers); shows correct array data return [pickerUsers count]; } I can provide additional code if it might help. Thanks in advance.

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  • how can stop creating duplicates in camera roll while using UISaveVideoAtPathToSavedPhotosAlbum to s

    - by srikanth rongali
    I have a video in applications documents folder. I need it to be saved in camera roll. So, I used UISaveVideoAtPathToSavedPhotosAlbum method to save it in camera roll. It's working and I can see the video added to camera roll. But, the problem is every time I execute the application with same video(with same file name), it is added another time in camera roll instead of replacing the old one. So, it is creating the duplicates of the video. How can I make the application work like if a video is present in camera roll and again added with same file name, then old one is replaced by new video.

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  • How to change font size in a pickerview?

    - by user183804
    I'm fairly new to iPhone programming and am trying to implement a double-component PickerView. At this point the picker works fine in terms of taking user input, created with Interface Builder. However, I need to change the font size to accommodate the text length in each column. I very much would appreciate any link to a straightforward method to creating a multi-component picker with an adjustable font size. Seems like it is not possible if Interface Builder is used to create the picker. So far I have not found any code links that address this issue in detail. Thanks in advance.

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  • changing a picker to table view OR having multiple table views on the same view

    - by Brodie4598
    Hello - My iPad app was rejected due to my use of a picker. The picker was used to control a table view. In my view, a picker was displaying a series of items and when one of those items was selected, it used that selection to populate a table with data. (hopefully that makes sense). Now I need to do this without the picker so I need to have the data that was in the picker be represented in a table view. My question, is how do I have multiple tableViews in the same view? I'm guessing I need to have some kind of if statement in the tableview delegate methods, but I'm not quite sure what the if statement needs to be. Or maybe i'm thinking of this the totally wrong way thanks

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  • Pickerview as a Subview

    - by Cancel
    Hi all. I am trying to create a Dialog Box in which contains a Pickerview. I can get it to work without the Subview tied around it but I always end up with an Uncaught error. Any help?

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  • UIPicker reloading content

    - by kumaravel
    Hi i have a problem with UIPicker, im keeping my Picker in Navigation controller. i want the Picker content to reload whenever the navigation controller push the PickerView. but the pickerview content maintaining same state in all navigation.. how to change this?

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  • How do I change the text size and component width of a UIPickerView?

    - by rksprst
    I have the following code to create a UIPickerView: pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0.0f, 416.0f - height, 320.0f, height)]; pickerView.delegate = self; pickerView.showsSelectionIndicator = YES; [pickerView setSoundsEnabled:YES]; I would like to change the component widths and change the text size in each component. Is it possible to do this? Thanks!

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  • NSUserDefaults loses 3 rows each time it's called

    - by Jeff Decker
    Hello Everyone! Brand new programmer here, so off-topic help/constructive criticism welcome. I am saving a default state (such as "New York") in a UIPickerView which is in a FlipSideView. It certainly saves for the first and second time I check to make sure it's the same state (I am clicking "done" and then "info" repeatedly), but on the third check the picker has moved up three states (to "New Hampshire") and then every time I check the picker progresses three more states. Here's the .h and .m files of the FlipSideViewController: #import <UIKit/UIKit.h> import "Calculator.h" @protocol FlipsideViewControllerDelegate; @interface FlipsideViewController : UIViewController { id delegate; UIPickerView *myPickerView; NSArray *pickerViewArray; } @property (nonatomic, assign) id delegate; @property (nonatomic, retain) UIPickerView *myPickerView; @property (nonatomic, retain) NSArray *pickerViewArray; (IBAction)done; @end @protocol FlipsideViewControllerDelegate - (void)flipsideViewControllerDidFinish:(FlipsideViewController *)controller; @end import "FlipsideViewController.h" @implementation FlipsideViewController @synthesize delegate; @synthesize myPickerView, pickerViewArray; -(CGRect)pickerFrameWithSize:(CGSize)size;{ CGRect screenRect = [[UIScreen mainScreen] applicationFrame]; CGRect pickerRect = CGRectMake( 0.0, screenRect.size.height - size.height, size.width, size.height); return pickerRect; } (void)viewDidLoad { [super viewDidLoad]; self.view.backgroundColor = [UIColor viewFlipsideBackgroundColor]; [self createPicker]; } -(void)viewWillAppear:(BOOL)animated;{ [super viewWillAppear:NO]; NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [myPickerView selectRow:[defaults integerForKey:@"pickerRow"] inComponent:0 animated:NO]; } -(void)createPicker;{ pickerViewArray = [[NSArray arrayWithObjects: @"Alabama",@"Alaska", @"Arizona",@"Arkansas",@"California",@"Colorado",@"Connecticut",@"Delaware", @"District of Columbia",@"Florida",@"Georgia",@"Hawaii",@"Idaho",@"Illinois",@"Indiana",@"Iowa", @"Kansas",@"Kentucky",@"Louisiana",@"Maine",@"Maryland",@"Massachusetts",@"Michigan", @"Minnesota",@"Mississippi",@"Missouri",@"Montana",@"Nebraska",@"Nevada",@"New Hampshire",@"New Jersey", @"New Mexico",@"New York",@"North Carolina",@"North Dakota",@"Ohio",@"Oklahoma", @"Oregon",@"Pennsylvania",@"Rhode Island",@"South Carolina",@"South Dakota",@"Tennessee", @"Texas",@"Utah",@"Vermont",@"Virginia",@"Washington",@"West Virginia",@"Wisconsin",@"Wyoming", nil] retain]; myPickerView = [[UIPickerView alloc] initWithFrame:CGRectZero]; CGSize pickerSize = [myPickerView sizeThatFits:CGSizeZero]; myPickerView.frame = [self pickerFrameWithSize:pickerSize]; myPickerView.autoresizingMask = UIViewAutoresizingFlexibleWidth; myPickerView.showsSelectionIndicator = YES; myPickerView.delegate = self; myPickerView.dataSource = self; [self.view addSubview:myPickerView]; } (IBAction)done { [self.delegate flipsideViewControllerDidFinish:self]; } pragma mark - pragma mark UIPickerViewDataSource (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [defaults setInteger:row forKey:@"pickerRow"]; [defaults setObject:[pickerViewArray objectAtIndex:row] forKey:@"pickerString"]; return [pickerViewArray objectAtIndex:row]; } (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; [defaults setInteger:row forKey:@"pickerRow"]; [defaults setObject:[pickerViewArray objectAtIndex:row] forKey:@"pickerString"]; } (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component { return 240.0; } (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component { return 40.0; } (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { return [pickerViewArray count]; } (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; } call me mystified! Thanks for any help. Please let me know if I can make myself more clear...

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  • Picker view wont rotate- iPhone

    - by lotuseater
    hi, I am making a booking page. I have included 3 pickers in it. I have included all the delegates required for the pickers to work but it wont rotate. I have enabled user interaction and multitouch in the nib file. Here is my code. Please help me. :( @interface ChooseContactsFrom : UIViewController { IBOutlet UIPickerView *statePickup; IBOutlet UIPickerView *paymentMethodPickup; IBOutlet UIDatePicker *expiryDatePickup; IBOutlet UIView *statePickupView; IBOutlet UIView *paymentMethodPickupView; IBOutlet UIView *expiryDatePickupView; } (void)viewDidLoad { self.title = @"Choose Contacts"; //Fill in the states name/ stateArray = [[NSArray alloc]initWithObjects:@"",nil]; paymentModeArray = [[NSArray alloc] initWithObjects:@"Credit Card", @"Cash",@"Account",@"Voucher",@"Debit Card", nil]; paymentMethodPickup.frame = CGRectMake(0.0, 44.0, paymentMethodPickup.frame.size.width, paymentMethodPickup.frame.size.height); paymentMethodPickup.userInteractionEnabled = YES; paymentMethodPickup.multipleTouchEnabled = YES; paymentMethodPickupView.frame = CGRectMake(0.0, 210.0, paymentMethodPickupView.frame.size.width, paymentMethodPickupView.frame.size.height); statePickup.frame = CGRectMake(0.0, 44.0,statePickup.frame.size.width, statePickup.frame.size.height); statePickupView.frame = CGRectMake(0.0, 210.0, statePickupView.frame.size.width, statePickupView.frame.size.height); stateArray = [[NSArray alloc] initWithObjects:@"state1", @"state2", @"state3", @"state4", @"state5", @"state6", @"state7", @"state8", @"state9", @"state10", nil]; expiryDatePickup.frame = CGRectMake(0.0, 44.0, expiryDatePickup.frame.size.width, expiryDatePickup.frame.size.height); expiryDatePickupView.frame = CGRectMake(0.0, 210.0, expiryDatePickupView.frame.size.width, expiryDatePickupView.frame.size.height); [super viewDidLoad]; } -(IBAction)back:(id)sender { [self dismissModalViewControllerAnimated:YES]; } pragma mark pickerView delegates (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView { return 1; } (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { if( thePickerView == statePickup) { return [stateArray count]; } else if(thePickerView == paymentMethodPickup) { return [paymentModeArray count]; } else { return 0; } } (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { if(thePickerView == statePickup) { return [stateArray objectAtIndex:row]; } else if(thePickerView == paymentMethodPickup) { return [paymentModeArray objectAtIndex:row]; } else { return @" "; } } (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component{ return 50; } (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component { return 250; } (void)pickerView:(UIPickerView *)thepickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { if(thepickerView == statePickup) { state.text=[stateArray objectAtIndex:row]; } if(thepickerView == paymentMethodPickup) { payment.text=[paymentModeArray objectAtIndex:row]; } } (void)ClearSubviews { //[firstName resignFirstResponder]; // [lastName resignFirstResponder]; // [email resignFirstResponder]; // [address1 resignFirstResponder]; // [address2 resignFirstResponder]; // [city resignFirstResponder]; // //[state resignFirstResponder]; // [payment resignFirstResponder]; // [creditCard resignFirstResponder]; // [expirydate removeFromSuperview]; // [statePickup removeFromSuperview]; // [paymentMethodPickup removeFromSuperview]; } (BOOL)textFieldShouldBeginEditing:(UITextField *)textField { // [self showPicker:textField]; //[self setViewMovedUp]; if(textField == firstName || textField == lastName || textField == email || textField == address1 || textField == address2 ||textField == city) { [self ClearSubviews]; //pickerToolbar.hidden = TRUE; return YES; } else if(textField == payment) { [self ClearSubviews]; [self setViewMovedUp]; [payment setText:[paymentModeArray objectAtIndex:0]]; [self.view insertSubview:paymentMethodPickupView aboveSubview:self.view]; return NO; } else if(textField == state) { [self ClearSubviews]; [self setViewMovedUp]; [state setText:[stateArray objectAtIndex:0]]; [self.view insertSubview:statePickupView aboveSubview:self.view]; return NO; } else if(textField == expirydate) { [self setViewMovedUp]; expiryDatePickup.date = [NSDate date]; NSDate *date1 = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; NSString *strDate=[dateFormatter stringFromDate:date1]; NSString *str=[[NSString alloc] initWithString: strDate]; [expirydate setText:str]; [self.view insertSubview:expiryDatePickupView aboveSubview:self.view]; return NO; } else if(textField == creditCard) { [self ClearSubviews]; [self setViewMovedUp]; return YES; } else { [self ClearSubviews]; return YES; } } -(BOOL)textFieldShouldEndEditing:(UITextField *)textField { return YES; } (void)textFieldDidEndEditing:(UITextField *)textField { if(textField == creditCard) { [self moveDown]; } } (BOOL)textFieldShouldReturn:(UITextField *)textField { [firstName resignFirstResponder]; [lastName resignFirstResponder]; [email resignFirstResponder]; [address1 resignFirstResponder]; [address2 resignFirstResponder]; [city resignFirstResponder]; [creditCard resignFirstResponder]; return YES; } -(IBAction)textFieldDoneEditing:(id)sender { [sender resignFirstResponder]; } ////////----------------------------------------------------------------------- pragma mark move screen (void)setViewMovedUp { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.3]; // Make changes to the view's frame inside the animation block. They will be animated instead // of taking place immediately. CGRect rect = [self.view frame]; // If moving up, not only decrease the origin but increase the height so the view // covers the entire screen behind the keyboard. rect.origin.y -= 50.0f; rect.size.height -= 80.0f; [self.view setFrame:rect]; [UIView commitAnimations]; } -(void)moveDown { [UIView beginAnimations:nil context:NULL]; [UIView setAnimationDuration:0.3]; // Make changes to the view's frame inside the animation block. They will be animated instead // of taking place immediately. CGRect rect = [self.view frame]; rect.origin.y += 50.0f; rect.size.height += 80.0f; [self.view setFrame:rect]; // [UIView setBackgroundColor:[UIColor darkGrayColor]]; [UIView commitAnimations]; } pragma mark Method to show pickers -(void)showPicker:(UITextField *)textField { if(textField == expirydate) { expiryDatePickup .date = [NSDate date]; NSDate *date1 = [NSDate date]; NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; NSString *strDate=[dateFormatter stringFromDate:date1]; NSString *str=[[NSString alloc] initWithString: strDate]; [expirydate setText:str]; [self.view insertSubview:expiryDatePickup aboveSubview:self.view]; } else if(textField == payment) { [payment setText:[paymentModeArray objectAtIndex:0]]; [self.view insertSubview:paymentMethodPickupView aboveSubview:self.view]; } else if(textField == state) { [state setText:[stateArray objectAtIndex:0]]; [self.view insertSubview:statePickupView aboveSubview:self.view]; } } (IBAction)datePickerChanged:(id)sender { NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; NSDate *date=expiryDatePickup.date; formattedDateString1 = [dateFormatter stringFromDate:date]; [expirydate setText:formattedDateString1]; NSCalendar *gregorian = [[NSCalendar alloc] initWithCalendarIdentifier:NSGregorianCalendar]; unsigned int unitFlags = NSMonthCalendarUnit | NSDayCalendarUnit; components = [gregorian components:unitFlags fromDate:date]; [gregorian release]; } pragma mark done and cancel methods -(IBAction) btnCancelExpiryDate:(id)sender { [self moveDown]; [expirydate setText:@" "]; [expiryDatePickupView removeFromSuperview]; } -(IBAction) btnDoneExpiryDate:(id)sender { [self moveDown]; [expiryDatePickupView removeFromSuperview]; expiryDatePickup .date = [NSDate date]; } -(IBAction)cancelPaymentType:(id)sender { [self moveDown]; [payment setText:@" "]; [paymentMethodPickupView removeFromSuperview]; } -(IBAction)donePaymentType:(id)sender { [self moveDown]; [paymentMethodPickupView removeFromSuperview]; } -(IBAction)doneState:(id)sender { [self moveDown]; [statePickupView removeFromSuperview]; } (IBAction)cancelState:(id)sender; { [self moveDown]; [state setText:@" "]; [statePickupView removeFromSuperview]; }

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  • Iphone UIView implementation

    - by Joo Park
    How does one code this scenerio in iphone sdk? In an expense app, when you want to add an expense, this view comes up. After selecting "Clothing," another view slides up with a UIPickerView control that has a "done" button which will dismiss the UIPickerView. Below is a screen shot after hitting "Clothing." I'm trying to figure out how one would slide up the UIPickerView half way up the screen with a "done" button on top of the "New Expense" view? thank you in advance!

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  • How do I send text to a UITextView?

    - by Lee
    I'm new to iphone development. I'm a VB programmer who is trying to convert a VB application to an ipad app. I need some help with sending text to a UITextView. I want to first have a UIPickerView and then once the user hits a UIButton, a UITextView appears and the text is then generated by my source code code, line by line. The code would constantly be concatenating strings to the text. It would sort of go like this-- 1) User makes selections with UIPickerView. 2) User then hits UIButton. 3) UIPickerView is replaced on the screen with a UITextView. 4) The code does stuff. 5) The code adds the 1st line of text into the UITextView. 6) The code does more stuff. 7) The code then adds the 2nd line of text into the UITextView, retaining the 1st line that was already there. Steps 6 and 7 are repeated until the code is done. Does anyone know of any examples of this that I could look at? I am mostly interested in finding something like a youtube video, a webpage that explains the code or even a good book that covers this particular topic. I am finding that the sample codes that Apple has on this site goes over my head. In fact, I could probably benefit from a good book. But, I am looking for one that I would already know covers this particular topic, since it is so essential to the app that I am trying to build.

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  • why can't I set a new instance's delegate as self?

    - by Guille10k
    I have a uipickerview, which appears with an ActionSheet. All this is in a class "MultiPicker". I create a new instance from "FirstViewController" this way: multiPicker *multiPic = [[multiPicker alloc]init]; multiPic.delegate = self; [multiPic action:aRunIndex]; And inside "multiPicker", in "action:" UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:title delegate:otroDelegate cancelButtonTitle:nil destructiveButtonTitle:@"Cancel" otherButtonTitles:@"Done", nil]; UIPickerView *pickerView = [[[UIPickerView alloc] init] autorelease]; pickerView.tag = 101; pickerView.delegate = self; pickerView.dataSource = self; pickerView.showsSelectionIndicator = YES; [actionSheet addSubview:pickerView]; [actionSheet showInView:self.view]; I need "FirstViewController" when MultiPicker finishes, so I can update a table in FirstView. I tried setting a new delegate to MultiPicker so, it tells FirstView when it finishes. But the instruction "multipic.delegate = self" in the first piece of code mades the app crash and says "Terminating due to uncaught exception". If I simply put all "MultiPicker" code inside FirstViewController class, not in a separate one, the action sheet stay blocked when I try to push a button different from "Cancel" Any idea? Thank u

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  • Observing MVC, can/should the Model be instantiated in the ViewController? Or where?

    - by user19410
    I'm writing an experimental iPhone app to learn about the MVC paradigm. I instantiate my Model class in the ViewController class. Is this stupid? I'm asking because storing the id of the Model class, and using it works where it's initialized, but referring to it later (in response to an interface action) crashes. Seemingly, the pointer address of my Model class instance changes, but how can that be? The code in question: @interface Soundcheck_Tone_GeneratorViewController : UIViewController { IBOutlet UIPickerView * frequencyWheel; @public Sinewave_Generation * sineGenerator; } @property(nonatomic,retain) Sinewave_Generation * sineGenerator; @end @implementation Soundcheck_Tone_GeneratorViewController @synthesize sineGenerator; - (void)viewDidLoad { [super viewDidLoad]; [self setSineGenerator:[[Sinewave_Generation alloc] initWithFrequency:20.0]]; // using reference -> fine } // pickerView handling is omitted here... - (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { [[self sineGenerator] setFrequency:20.0]; // using reference -> crash } @end // the Sinewave_Generation class... only to be thorough. Works fine so far. @interface Sinewave_Generation : NSObject { AudioComponentInstance toneUnit; @public double frequency,theta; } @property double frequency; - (Sinewave_Generation *) initWithFrequency: (int) f; @end @implementation Sinewave_Generation @synthesize frequency; - (Sinewave_Generation *) initWithFrequency: (int) f { self = [super init]; if ( self ) { [self setFrequency: f]; } return self; } @end

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  • UIPageViewController: How to refer the UIPicker selected Value from 1 Viewcontroller to another...

    - by Abhinav
    I am referring the code from here, please have look at the code while answering my question : http://www.ioslearner.com/wp-content/uploads/2011/12/UIPageViewControllerDemo.zip important notes and few changes: I basically have a viewcontroller and contentviewcontroller . ViewController - have following UIPAgeViewController Datasource and Deligate UIPickerView - upon next and previous page turn the value in the PickerView changes contentviewcontroller - has following UIWebview - defined in Viewdidload of contentviewcontroller which dynamically fetches a html page based upon the string value (LabelContents) sent through following method -(UIViewController *)pageViewController:(UIPageViewController *)pageViewController viewControllerBeforeViewController:(UIViewController *)viewController is there a way to populate the UIWebview in contentviewcontroller based upon the row selected in UIPickerView ? Kindly help.

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  • Can I just release the top object (iPhone)?

    - by yar
    If I release the object that's holding a reference to the variable that I need to release, is that sufficient? Or must I release at every level of the containment hierarchy? I fear that my logic comes from working with a garbage collector for too long. For instance, I assigned to this property of a UIPickerView instance by hand instead of using IB @property(nonatomic, assign) id<UIPickerViewDelegate> delegate Since it's an assign property, I can't just release the reference after I assign it. When I finally release my UIPickerView instance, do I need to do this: [singlePicker.delegate release]; [singlePicker release]; or is the second line sufficient? Also: Are these assign properties the norm, or is that mostly for Interface Builder? I thought that retain properties were the normal thing to expect.

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  • Correctly assigning value to a Core Data attribute with an integer data-type

    - by Gordon Fontenot
    I'm missing something here, and feeling like an idiot about it. I'm using a UIPickerView in my app, and I need to assign the row number to a 32-bit integer attribute for a Core Data object. To do this, I am using this method: -(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { object.integerValue = row; } This is giving me a warning: warning: passing argument 1 of 'setIntegerValue:' makes pointer from integer without a cast What am I mixing up here? --Edit 1-- Ok, so I can get rid of the warning by changing the method to do the following: NSNumber *number = [NSNumber numberWithInteger:row]; object.integerValue = rating; However, I still get a value of 0 for object.integerValue if I use NSLog to print it out. object.integerValue has a max value of 5, so I print out number instead, and then I'm getting a number above 62,000,000. Which doesn't seem right to me, since there are 5 rows. If I NSLog the row variable, I get a number between 0 and 5. So why do I end up with a completely different number after casting the number to NSNumber? --Edit 2-- Ok, so I'm realizing that there is some fundamental idea that I don't understand. I now understand that the 60 million + number can be cast back to the correct 0-5 number by using integerValue. So, it seems my question is how can I save an integer between 0-5 to the attribute if the NSNumber that is returned is over 60 million? Do I need to be using a different data type?

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  • Objective-C Protocols within Protocols

    - by LucasTizma
    I recently began trying my hand at using protocols in my Objective-C development as an (obvious) means of delegating tasks more appropriately among my classes. I completely understand the basic notion of protocols and how they work. However, I came across a roadblock when trying to create a custom protocol that in turn implements another protocol. I since discovered the solution, but I am curious why the following DOES NOT work: @protocol STPickerViewDelegate < UIPickerViewDelegate > - ( void )customCallback; @end @interface STPickerView : UIPickerView { id < STPickerViewDelegate > delegate; } @property ( nonatomic, assign ) id < STPickerViewDelegate > delegate; @end Then in a view controller, which conforms to STPickerViewDelegate: STPickerView * pickerView = [ [ STPickerView alloc ] init ]; pickerView.delegate = self; - ( void )customCallback { ... } - ( NSString * )pickerView:( UIPickerView * )pickerView titleForRow:( NSInteger )row forComponent:( NSInteger )component { ... } The problem was that pickerView:titleForRow:forComponent: was never being called. On the other hand, customCallback was being called just fine, which isn't too surprising. I don't understand why STPickerViewDelegate, which itself conforms to UIPickerViewDelegate, does not notify my view controller when events from UIPickerViewDelegate are supposed to occur. Per my understanding of Apple's documentation, if a protocol (A) itself conforms to another protocol (B), then a class (C) that conforms to the first protocol (A) must also conform to the second protocol (B), which is exactly the behavior I want and expected. What I ended up doing was removing the id< STPickerViewDelegate > delegate property from STViewPicker and instead doing something like the following in my STViewPicker implementation where I want to evoke customCallback: if ( [ self.delegate respondsToSelector:@selector( customCallback ) ] ) { [ self.delegate performSelector:@selector( customCallback ) ]; } This works just fine, but I really am puzzled as to why my original approach did not work.

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  • UIViewController parentViewController access properties

    - by Dave
    I know this question has been asked several times and I did read existing posts on this topic but I still need help. I have 2 UIViewControllers - Parent and Child. I display the child view using the presentModalViewController as below: ChildController *child = [[ChildController alloc[ initWithNibName:@"ChildView" bundle:nil]; [self presentModalViewController:child animated:YES]; [child release]; The child view has a UIPickerView. When user selects an item from UIPickerView and clicks done, I have to dismiss the modal view and display the selected item on a text field in the parent view. In child's button click delegate, I do the following: ParentController *parent = (ParentController *)[self.navigationController parentViewController]; [parent.myTextField setText:selectedText]; [self dismissModalViewControllerAnimated:YES]; Everything works without errors. But I don't know how to load the Parent View so that it displays the updated text field. I tried [parent reloadInputViews]; doesn' work. Please help.

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  • objective-c having issues with an NSDictioary object

    - by Mark
    I have a simple iPhone app that Im learning and I want to have an instance variable called urlLists which is an NSDictionary I have declared it like so: @interface MyViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate>{ IBOutlet UIPickerView *pickerView; NSMutableArray *categories; NSDictionary *urlLists; } @property(retain) NSDictionary *urlLists; @end and in the implementation: @implementation MyViewController @synthesize urlLists; ... - (void)viewDidLoad { [super viewDidLoad]; categories = [[NSMutableArray alloc] init]; [categories addObject:@"Sport"]; [categories addObject:@"Entertainment"]; [categories addObject:@"Technology"]; [categories addObject:@"Political"]; NSArray *objects = [NSArray arrayWithObjects:@"value1", @"value2", @"value3", @"value4", nil]; urlLists = [NSDictionary dictionaryWithObjects:objects forKeys:categories]; for (id key in urlLists) { NSLog(@"key: %@, value: %@", key, [urlLists objectForKey:key]); } } ... @end And, this all works up to here. I have added a UIPicker to my app, and when I select one of the items, I want to Log the one picked and its related entry in my dictionary. -(void) pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger) component { for (id key in self.urlLists) { NSLog(@"key: %@, value: %@", key, [urlLists objectForKey:key]); } } but I get the old EXC_BAD_ACCESS error... I know Im missing something small, but what? Thanks

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