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  • Is "self" necessary?

    - by Rob
    Is using "self" ever necessary in Objective-C or maybe just a good practice? I have gone from using it all the time to not using it at all and I don't seem to really notice any difference. Isn't it just implied anyway?

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  • Why Camera.setParameters(Camera.Parameters) does not work on Sony-Ericsson X10 and Droid?

    - by mobilekid
    Has anyone come across a strange behaviour with the Camera API when used on Sony-Ericsson X10 or Droid? For example the following code doesn't work on those devices. As a result I'm getting a lot of negative feedback on the Market translating into many cancelled orders... mParameters.set("rotation", orientation); mParameters.set("jpeg-quality", img_quality); mParameters.set("picture-size", "1024x768"); mCamera.setParameters(mParameters); Could you suggest an alternative way of achieving the same? Thanks.

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  • Core Data - Best way to save a "number of items"

    - by Daniel Granger
    The user will have a static list of items to choose from. Using a Picker View they will choose one of the items and then select how many of them they want. Whats the best way to save this in core data? A Struct? struct order { NSInteger item; NSInteger numberOf; }; Or some sort of relationship? Many Thanks

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  • Android "hello world" - versions

    - by Ianb
    Starter question: My "Hello World" attempt won't run, ("No compatible targets were found"), I think this is bacause I selected the latest version for my project (2.2), and the highest AVD version is 2.0.1. Does this make sense? Can I change my project version (haven't been able to find a way to do this), or do I have to start again? If the versions are not backwards compatible, what is the best version to use for the majority of Android devices out there? Thanks

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  • How to get on which ListView has been a ContextItem selected?

    - by Pentium10
    I have a screen with three listviews, each having three different cursors, but all have the same ContextMenu show/resolve code and when the selection event fires, I want to get the ListView to refresh it. I can't use menuInfo.targetView, as that holds the LinearLayout for the ListView row, and not the ListView. in this method public boolean onContextItemSelected(MenuItem item) How is possible?

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  • iPhone settings not honoured

    - by winsmith
    My iPhone app has the following problem: Freshly installed, when I read out my "Play Sound" preference with the following code: defaults = [NSUserDefaults standardUserDefaults]; NSLog(@"Play Sounds? %d", [defaults boolForKey:@"play_sounds_preference"]); The setting always reads out as false, even though the default setting is set to true. Any ideas? Here is my Root.plist: <?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd"> <plist version="1.0"> <dict> <key>StringsTable</key> <string>Root</string> <key>PreferenceSpecifiers</key> <array> <dict> <key>Type</key> <string>PSGroupSpecifier</string> <key>Title</key> <string>General Settings</string> </dict> <dict> <key>Type</key> <string>PSToggleSwitchSpecifier</string> <key>Title</key> <string>Sounds</string> <key>Key</key> <string>play_sounds_preference</string> <key>DefaultValue</key> <true/> </dict> </array> </dict> </plist> When the user opens the Settings.app and navigates to my app's name, THEN the setting reads out as true, even if the user doesn't change anything.

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  • Dynamic attached UILabel is not moving.

    - by coure06
    I have attached a UILabel to view. Now i want to move that label but its not working. here is my code UILabel *tick = (UILabel *)[self.view viewWithTag:tag]; CGRect frame = tick.frame; frame.origin.x = newVal; frame.origin.y = newVal; I can change text value of the UILabel tick but how can i move it here and there?

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  • About setStatusBarHidden

    - by iTarek
    Today my app approved, but I got emails from users says it crash. I figured out that [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation: UIStatusBarAnimationSlide]; Is the problem, Because users have firmware 3.1.x this API is not working and app crash. So I have replace it with if ([[[UIDevice currentDevice] systemVersion] floatValue]>=3.2) [[UIApplication sharedApplication] setStatusBarHidden:YES withAnimation: UIStatusBarAnimationSlide]; else [[UIApplication sharedApplication] setStatusBarHidden:YES animated:YES]; My questions... Is what I did the best solution? Why XCODE did not warn me that SetStatusBarHidden withAnimation is not in 3.0 while I set my Traget OS firmware 3.0? Do I have to check on every API to see if it is working with my Target OS? Thank you

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  • iphone app time counter

    - by Sam
    I would like to create a time counter in my app that shows the user how many minutes the app has been running the current session and total. How do I create such time counter and how do I save the value to the phone? I'm new to app developement.

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  • Best way to create Default.png image for iPhone app

    - by Alex
    Originally I though I'll just take a screenshot of my app on the iPhone then tweak it in Photoshop. The images should be 480 x 320 according to Apple doc, and the dimensions of my screenshot are 480 x 320. But, the screenshot contains notification area (where reception bars, battery life, etc. are displayed) So, if I chop that part off my image will be a bit shorter and not 480px high. What do I do? Submit a shorter image? Stretch it up so it's 480px but without the notification bar? Submit it with the notification bar in the image? How did you create your Default.png?

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  • How to sign an APK with more than one certificate?

    - by ddcruver
    How do I sign an APK with more than one certificate, so that I can do this when I publish to the Android Market: Version 1.0 = Signed with Certificate A Version 2.0 = Signed with Certificate A & B Version 3.0 = Signed with Certificate B The Android Market does give me some hope but I am not sure what to make of it, when I upload with a different sign certificate it gives me this message: "The apk must be signed with at least one certificate in common with the previous version." Motive: I have published an app on the market using the Android Signing Tool as part of MotoDev Studio for android. The problem is that it handles the keys itself and there is no way (documented) to get them. I want to change it to use a keystore and certificate that I have more control of and can use even if I don't use MotoDev Studio anymore. Also it seems that MotoDev Studio will lock you out of new features such as shared libraries.

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  • HElp for Https???

    - by madhavi
    i want to send request on Https so do i need to install the SSL certificate as the steps are given for apple push notification please help me i am new and i have never worked on OpenSSL

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  • Why Camera.setParameters(Camera.Parameters) has no effect on Sony-Ericsson X10 and Droid?

    - by mobilekid
    Has anyone come across a strange behaviour with the Camera API when used on Sony-Ericsson X10 or Droid? For example the following code doesn't work on those devices. As a result I'm getting a lot of negative feedback on the Market translating into many cancelled orders... mParameters.set("rotation", orientation); mParameters.set("jpeg-quality", img_quality); mParameters.set("picture-size", "1024x768"); mCamera.setParameters(mParameters); Could you suggest an alternative way of achieving the same? Thanks.

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  • How to raise an action picker with options of Send to via sms, email, etc.

    - by Pentium10
    I've seen in applications a popup that prompts me what I do want to do with a text. I am prompted to choose from Send by SMS, Send by Email, Send by Bluetooth, Send by Fring etc. How do I make such a popup, it seamed to be automatically built? Also how do I tell what message to use? And if needed how do I tell who the contact is? Maybe chooses the options based on the contact, (if has email, show email)

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  • Read/Write on Plist file without using the iPhone SImulator?

    - by Silent
    Hello all, i am using an example from the iphone developer book from apress. the problem is that this example only works on the simulator im trying to figure out how i can make it work on the device. This chapter isn't working at all. below is the sample code. data.plist is located in the resource folder. NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); NSString *documentsDirectory = [paths objectAtIndex:0]; return [documentsDirectory stringByAppendingPathComponent:kFilename]; Below then checks to see if the file is located. this is skipped, so im guessing this does not find the file. if ([[NSFileManager defaultManager]fileExistsAtPath:filePath]) { NSArray *array = [[NSArray alloc] initWithContentsOfFile:filePath]; BGDataSave = [array objectAtIndex:0]; NSLog(@"%@", BGDataSave); price.text = [array objectAtIndex:1]; percent.text = [array objectAtIndex:2]; salepriceLabel.text = [array objectAtIndex:3]; origpriceLabel.text = [array objectAtIndex:4]; }

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  • what is WEBDAV?

    - by senthilmuthu
    hi, i want to use webDAv server to share files among systems and (iPod or iPhone)in my iphone project.to use it,i have to use individual webserver? or is it a built in facility ? any one can help?

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  • how to slove error when using thread?

    - by ChandreshKanetiya
    I have following error msg in console when using NSThread "Tried to obtain the web lock from a thread other than the main thread or the web thread. This may be a result of calling to UIKit from a secondary thread. Crashing now..." I have submit my sample code here - (void)viewDidLoad { appDeleg = (NewAshley_MedisonAppDelegate *)[[UIApplication sharedApplication] delegate]; [[self tblView1] setRowHeight:80.0]; [super viewDidLoad]; self.title = @"Under Ground"; [UIApplication sharedApplication].networkActivityIndicatorVisible = YES; [NSThread detachNewThreadSelector:@selector(CallParser) toTarget:self withObject:nil]; } -(void)CallParser { Parsing *parsing = [[Parsing alloc] init]; [parsing DownloadAndParseUnderground]; [parsing release]; [self Update_View]; //[myIndicator stopAnimating]; [UIApplication sharedApplication].networkActivityIndicatorVisible = NO; } here "DownloadAndParseUnderground" is the method of downloding data from the rss feed and -(void) Update_View{ [self.tblView1 reloadData]; } when Update_View method is called the tableView reload Data and in the cellForRowAtIndexPath create error and not display custom cell - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath { static NSString *CellIdentifier = @"Cell"; CustomTableviewCell *cell = (CustomTableviewCell *) [tblView1 dequeueReusableCellWithIdentifier:CellIdentifier]; if (cell == nil) { [[NSBundle mainBundle] loadNibNamed:@"customCell" owner:self options:nil]; cell = objCustCell; objCustCell = nil; }

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  • UserID is returned as 0 and Token has the 3rd part missing for a Canvas Facebook Application!

    - by Nader Rahimizad
    Hi Guys, Do you know what could cause this as a return for a Facebook Canvas app. It works for most users of our site but some users, it generates this and i cant figure out what would cause this. The userID is returned as 0 and the Token seems to be missing something. there is no other way for the users to reach the site other than visiting the Facebook App page... Please let me know what i can do to prevent this from happening UserID: 0 Token: 104743107829|b8bbc20eac6127d8a9a85451490a0663 Quesrty String:signed_request=W13Y8eiSHTyyqBnyJjll8WngPFeQqabhVBkJaHnXYb4.eyJhbGdvcml0aG0iOiJITUFDLVNIQTI1NiIsImlzc3VlZF9hdCI6MTI5NDU5NjIwMywidXNlciI6eyJsb2NhbGUiOiJpdF9JVCIsImNvdW50cnkiOiJpdCJ9fQ

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  • Obj-C Sending Messages Between Classes

    - by user544359
    I'm a newbie in iPhone Programming. I'm trying to send a message from one view controller to another. The idea is that viewControllerA takes information from the user and sends it to viewControllerB. viewControllerB is then supposed to display the information in a label. viewControllerA.h #import <UIKit/UIKit.h> @interface viewControllerA : UIViewController { int num; } -(IBAction)do; @end viewControllerA.m #import "viewControllerA.h" #import "viewControllerB.h" @implementation viewControllerA - (IBAction)do { //initializing int for example num = 2; viewControllerB *viewB = [[viewControllerB alloc] init]; [viewB display:num]; [viewB release]; //viewA is presented as a ModalViewController, so it dismisses itself to return to the //original view, i know it is not efficient [self dismissModalViewControllerAnimated:YES]; } - (void)dealloc { [super dealloc]; } @end viewControllerB.h #import <UIKit/UIKit.h> @interface viewControllerB : UIViewController { IBOutlet UILabel *label; } - (IBAction)openA; - (void)display:(NSInteger)myNum; @end viewControllerB.m #import "viewControllerB.h" #import "viewControllerA.h" @implementation viewControllerB - (IBAction)openA { //presents viewControllerA when a button is pressed viewControllerA *viewA = [[viewControllerA alloc] init]; [self presentModalViewController:viewA animated:YES]; } - (void)display:(NSInteger)myNum { NSLog(@"YES"); [label setText:[NSString stringWithFormat:@"%d", myNum]]; } @end YES is logged successfully, but the label's text does not change. I have made sure that all of my connections in Interface Builder are correct, in fact there are other (IBAction) methods in my program that change the text of this very label, and all of those other methods work perfectly... Any ideas, guys? You don't need to give me a full solution, any bits of information will help. Thanks.

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