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  • Using CGRectIntersectsRect for collision detection

    - by user309030
    Hi guys, I've got a long rectangular image which is rotated at different kind of angles. However the frame of the rectangular image does not rotate along with the image and instead, the rotation causes the frame to to become larger to fit the rotated image. So when I used CGRectIntersectsRect, the collision detection is totally off because the other image colliding with the rectangular image will collide before it even reaches the visible area of the rect image. In case you don't really know what I'm talking about, have a look at the ascii drawing: normal rectangular image frame, O - pixels, |, – - frame |----------| |OOOOOOOOOO| |----------| after rotation |----------| |O | | O | | O | | O | | O | | O | | O | | O | | O | |----------| I've read through some of the collision articles but all of them are talking about collision with a normal straight rectangle and what I really want is collision with a slanted image, preferably pixel collision detection. TIA for any suggestions made.

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  • how do I call create a name of a button variable in a code, with a number in it? (hard to explain)

    - by Sam Jarman
    Ive got a int, that is changed in a previous method, that now has to be part of the name of a button variable eg int numberFromLastOne; numberFromLastOne = 4; I then want to get 'button4' to do something. Could i use something like this? [[button@"%d", numberFromLastOne] doSomethign:withSomethignElse]; Ive never had to do something this before.... Any ideas would be appreciated :) Sam

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  • How to retrieve Directories size including all sub-directories?

    - by vikingosegundo
    I have stored images from the net like this Documents/imagecache/domain1/original/path/inURI/foo.png Documents/imagecache/domain2/original/path/inURI/bar.png Documents/imagecache/... Documents/imagecache/... Now I'd like to check the size of imagecache including all it sub-directories. Is there a convenient way of doing it — preferable without crawling through all the data manually?

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  • Backspace in UITextView substringToIndex , app is crashing .

    - by user271753
    Hey Guys check this code ( My Custom Keyboard) : -(IBAction) updateTextBackSpace:(id)sender { if([txtview.text length]>0) { NSString *deletedLastCharString = [txtview.text substringToIndex:([txtview.text length]-1)]; [txtview setText:deletedLastCharString]; } else { NSLog("End"); } I am able to erase the letters ( backspace ) but after the first letter is erased and if I press backspace one more time then the application crashes .. AND the main thing is that I can't figure out how to change this code so that , I can erase any text in any give line at the cursor, the backspace starts to erase from end of the line . Please Help

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  • UIWebview does not show up into UINavigationController

    - by Pato
    Hi I have a tabBar application. In the first tab, I have a navigation bar. In this navigation bar I have a table view. When the user clicks a cell of the table, it goes to another table view, and when the user clicks a cell in that table, it goes to a webview to open a web page. Basically, it goes fine until opening the webview. In the webview, viewDidLoad is called and seems to work properly. However, webViewDidStartLoad is never called and the web page never shows up. I am not using IB. I build the UITabBarController in the AppDelegate, where I also assign an instance of my UINavigationController for each tab. I call the webview from the second UITableViewController as follows: rssWebViewController = [[webViews objectAtIndex: indexPath.row] objectForKey:@"controller"]; [[self navigationController] pushViewController:rssWebViewController animated:YES]; I have checked that the navigationController is there and it seems just fine. The viewDidload of my webview is as follows: - (void)viewDidLoad { [super viewDidLoad]; NSString *urlAddress = self.storyUrl; NSURL *url = [NSURL URLWithString:urlAddress]; NSURLRequest *requestObj = [NSURLRequest requestWithURL:url]; [[self rssWebView] setDelegate: self]; [[self view] addSubview:[self rssWebView]]; [rssWebView loadRequest:requestObj]; self.rssWebView.scalesPageToFit = YES; self.rssWebView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight); } The web view controller interface is defined as follows: @interface RSSWebViewController : UIViewController <UIWebViewDelegate>{ IBOutlet UIWebView *rssWebView; IBOutlet NSString *storyUrl; IBOutlet NSString *feedName; } @property (nonatomic, retain) IBOutlet UIWebView *rssWebView; @property (nonatomic, retain) IBOutlet NSString *storyUrl; @property (nonatomic, retain) IBOutlet NSString *feedName; @end Any help is greatly appreciated.

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  • Press a Button and open a URL in another ViewController

    - by Dennis Borup Jakobsen
    I am trying to learn Xcode by making a simple app. But I been looking on the net for hours (days) and I cant figure it out how I make a button that open a UIWebView in another ViewController :S first let me show you some code that I have ready: I have a few Buttons om my main Storyboard that each are title some country codes like UK, CA and DK. When I press one of those Buttons I have an IBAction like this: - (IBAction)ButtonPressed:(UIButton *)sender { // Google button pressed NSURL* allURLS; if([sender.titleLabel.text isEqualToString:@"DK"]) { // Create URL obj allURLS = [NSURL URLWithString:@"http://google.dk"]; }else if([sender.titleLabel.text isEqualToString:@"US"]) { allURLS = [NSURL URLWithString:@"http://google.com"]; }else if([sender.titleLabel.text isEqualToString:@"CA"]) { allURLS = [NSURL URLWithString:@"http://google.ca"]; } NSURLRequest* req = [NSURLRequest requestWithURL:allURLS]; [myWebView loadRequest:req]; } How do I make this open UIWebview on my other Viewcontroller named myWebView? please help a lost man :D

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  • Preset value of HTML Forms

    - by laura
    Hi. I'm trying to preset the value of a dropdown menu and the value of a text box in an HTML form. As soon as the user taps the button in my iPhone app, it enters the webview and I was hoping to preset one of the dropdown menus and text field. How do I go about this? I want to set the dropdown to value "4" and the text field to "Giro Apps" Here's the relevant HTML form code: <select id="advSrcId" class="list" onchange="showOther($('advSrcId').options[$('advSrcId').selectedIndex].value)" name="advSrcId"> <option selected="" value="">Select</option> <option value="1">Google</option> <option value="2">Facebook</option> <option value="3">Friend Referral</option> <option value="4">Other</option> </select> <div id="otherAdvsrc" style=""> <p> Please give details here: <br/> <input class="text" type="text" value="" name="advsrc"/> <br/> </p> </div> TIA!

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  • Dismissing pickers and keyboards invoked by a UIWebView

    - by Dev Kanchen
    I am implementing an in-app browser using UIWebView, that shows an 'action' button up-top that - when tapped - scales the UIWebView and allows the user to perform some other actions. If, however, at the point of tapping this 'action' button, the user were entering some text on the webview, or using a picker to select an option from a drop-down list, then the webview gets scaled without dismissing the keyboard/picker. Apart from being ugly, this also obscures my main view and controls. So is there a way to make a UIWebView dismiss all associated input controls, such as keyboards/pickers, when asked to? I tried using [myWebView resignFirstResponder] but that didn't work. Any ideas? Thanks.

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  • Security in Iphone?

    - by adusum
    Is There any concept of HTTPS in Iphone.how iphone apps are safe? if we are developing any apps related to some security?how can we provide security to iphone apps. I know that NSURL,NSURLConnection classes contains in Build HTTP but is there any concept of HTTPS? Thanks,

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  • Sorting Numbers ins a Object.

    - by user133611
    Hi I have an NSMutableArray of objects, let's say 'Person' Objects. I want to sort the NSMutable Array by person.savings i.e if suppose person having savings 1000,1050,500,1200,2000,1050 i want the Array in the ascending order. Thank You.

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  • Can't set text label in table view in Xcode for the iPhone

    - by Dave
    I have this code: tableList = [[NSMutableArray alloc] initWithObjects:@"First View",@"Second View",nil]; I have synthesized it and set the property, the problem is when I add this line under the configure the cell comment to set the text of each row, the app opens in the simulator but instantly closes: // Configure the cell. cell.textLabel.text = [tableList objectAtIndex:indexPath.row]; return cell; Any ideas on what is causing this ?

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  • My 3D object (opengl es) is disappearing behind the iPhone camera view

    - by KLC
    I have an augmented reality iPhone app that I am converting from Core Animation to OpenGL ES 1.1. I have added code that has been modified from the Apple OpenGL template. My problem is that my 3D object , when translating along the negative Z-axis (away from the user), appears to disappear into the camera view, until its completely gone. I have experimented with several solutions, but to no avail. What I have determined: Using the 3D icosahedron from Jeff Lamarche's blog here, the object starts it at 0,0,0 and then translates with decreasing z coordinates. By the time the z value reaches -2.0f, the object is gone. It appears as if it is disappearing behind the camera view. This is how I set my frustrum & viewport (unchanged from Apple's code) glMatrixMode(GL_PROJECTION); size = zNear * tanf(DEGREES_TO_RADIANS(fieldOfView) / 2.0); //Grab the size of the screen CGRect rect = self.bounds; glFrustumf(-size, size, -size / (rect.size.width / rect.size.height), size / (rect.size.width / rect.size.height), zNear, zFar); glViewport(0, 0, rect.size.width, rect.size.height); glMatrixMode(GL_MODELVIEW); glLoadIdentity(); What I have tried: The camera view is the main view and several other views are added to it as subviews, including the openGLView. I have commented those views out for test purposes. I have applied CATransforms to move the openGLView in the z direction -500 and +500, and done the same to the camera view. I have also changed the zFar in the above code to 1.0f, and it still disappears at z position of -2.0, which doesn't make sense (shouldn't it disappear at z=1.0?) My experimentation has got me more confused than when I started ( which usually means I am missing a key piece, but I can't figure out what). Thanks for your help.

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  • Anyone knows of a good addressbook implementation?

    - by Tsahi Levent-Levi
    I am looking to add an address book to one of my programs. For that purpose, I want to have something that is flexible and customizable to the point of allowing me to hook up additional metadata to contacts in it from third parties. I don't mind paying for a solution as long as I get something that is usable for me. My requirements: Optimized to run on embedded devices Preferably in source code form Ability to add my own fields to contacts over those the address book provides out of the box Ability to plugin "stuff" to it to enhance it without changing its base code too much Has a C or C++ interface

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  • iPhone: error: request for member 'table' in something not a structure or union

    - by Jack Griffiths
    Hi there, When it comes to compiling my application, I get the error mentioned in the title. How would I go about remedying this error? Basically, I want to get from one table to the other. Hierarchy, navigation. NextViewController.m #import "RootViewController.h" #import "NextViewController.h" @implementation NextViewController - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Releases the view if it doesn't have a superview // Release anything that's not essential, such as cached data } - (void)dealloc { [super dealloc]; } - (IBAction) changeTable:(NSString *)str{ tblCSS.table = str; } The last line contains the error. If you need any more code, just ask. I'll amend this post with it. Cheers, Jack

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  • Get string value of class propery names in Objective-C

    - by Flash84x
    I have the following class definition. Contact.h #import <CoreData/CoreData.h> @interface Contact : NSManagedObject { } @property (nonatomic, retain) NSString * City; @property (nonatomic, retain) NSDate * LastUpdated; @property (nonatomic, retain) NSString * Country; @property (nonatomic, retain) NSString * Email; @property (nonatomic, retain) NSNumber * Id; @property (nonatomic, retain) NSString * ContactNotes; @property (nonatomic, retain) NSString * State; @property (nonatomic, retain) NSString * StreetAddress2; @property (nonatomic, retain) NSDate * DateCreated; @property (nonatomic, retain) NSString * FirstName; @property (nonatomic, retain) NSString * Phone1; @property (nonatomic, retain) NSString * PostalCode; @property (nonatomic, retain) NSString * Website; @property (nonatomic, retain) NSString * StreetAddress1; @property (nonatomic, retain) NSString * LastName; @end Is it possible to obtain an array of NSString objects with all of the properties by name? Array would look like this... [@"City", @"LastUpdated", @"Country", .... ]

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  • off a sound effect with NSUserDefaults

    - by Momeks
    i try to off a sound effect on my app play method is [myMusic play]; ' BOOL soundIsOff = [defaults boolForKey:@"sound_off"]; //the problem is here //xcode compiler doesn't copile this code [myMusic play] = soundIsOff; sound code : ///sound effect ', NSString * musicSonati = [[NSBundle mainBundle] pathForResource:@"sound" ofType:@"wav"]; myMusic = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:musicSonati] error:NULL]; myMusic.delegate = self; myMusic.numberOfLoops = 0;

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  • a full-screen UIImagePickerController with the right scale?

    - by Kay
    Hi, I'm customizing my image picker controller and I want to have a full-screen viewfinder. I think this might be pretty an old topic and I found an answer here: http://www.gorbster.net/blog/archives/144 But what I want to know is if there's a way to achieve this without distorting the scale of the image. If I scale that clipped preview image, I'm distorting its original x-y ratio, and I want to avoid it. Is there a way to prevent the preview image from being clipped so that I could retain the original 1200x1600 ratio? Thanks!

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  • Custom view transition in OpenGL ES

    - by melfar
    I'm trying to create a custom transition, to serve as a replacement for a default transition you would get here, for example: [self.navigationController pushViewController:someController animated:YES]; I have prepared an OpenGL-based view that performs an effect on some static texture mapped to a plane (let's say it's a copy of the flip effect in Core Animation). What I don't know how to do is: grab current view content and make a texture out of it (I remember seeing a function that does just that, but can't find it) how to do the same for the view that is currently offscreen and is going to replace current view are there some APIs I can hook to in order to make my transition class as native as possible (make it a kind of Core Animation effect)? Any thoughts or links are greatly appreciated! UPDATE Jeffrey Forbes's answer works great as a solution to capture the content of a view. What I haven't figured out yet is how to capture the content of the view I want to transition to, which should be invisible until the transition is done. Also, which method should I use to present the OpenGL view? For demonstration purposes I used pushViewController. That affects the navbar, though, which I actually want to go one item back, with animation, check this vid for explanation: http://vimeo.com/4649397. Another option would be to go with presentViewController, but that shows fullscreen. Do you think maybe creating another window (or view?) could be useful?

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  • Change the background image in cocos2d

    - by Viral
    Hi all, I am making a game using cocos2d. in that I want to change the background after each second of time. I don't know how to do this in cocos2d. I am having 15 different images and one by one each image will be shown, i.e. after1 second next image will appear. I am new to cocos2d so, If any one can help me??? thank you in advance to all.

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  • Objective-C: Loop through NSDictionary to create seperate NSArray's

    - by Nic Hubbard
    I have a large NSDictionary structure that I need to loop through and create seperate NSArray's. Here is the structure: ( { id = { text = ""; }; sub = { text = " , "; }; text = ""; "thumb_url" = { text = ""; }; title = { text = "2010-2011"; }; type = { text = "title"; }; }, { id = { text = "76773"; }; sub = { text = "December 13, 2010"; }; text = ""; "thumb_url" = { text = "http://www.puc.edu/__data/assets/image/0004/76774/varieties/thumb.jpg"; }; title = { text = "College Days - Fall 2010"; }; type = { text = "gallery"; }; }, { id = { text = ""; }; sub = { text = ""; }; text = ""; "thumb_url" = { text = ""; }; title = { text = "2009-2010"; }; type = { text = "title"; }; }, { id = { text = "76302"; }; sub = { text = "December 3, 2010"; }; text = ""; "thumb_url" = { text = "http://www.puc.edu/__data/assets/image/0019/76303/varieties/thumb.jpg"; }; title = { text = "Christmas Colloquy"; }; type = { text = "gallery"; }; } ) Each section has a type key, which I need to check. When it finds the "title" key, I need to add those to an array. Then the next sections that would use the "gallery" key needs to be in its own array until it finds another "title" key. Then the "gallery" keys after that into their own array. I am using this a UITableView section titles and content. So, the NSDictionary above should have one NSArray *titles; array, and two other arrays each containing the galleries that came after the title. I have tried using a for loop but I just can't seem to get it right. And ideas would be appreciated.

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  • MKAnnotationView for userLocation pin iPhone

    - by Mauricio Galindo
    I have an application that uses MKMapView and at some point in the app I need to remove all the current pins in the map using [mapView removeAnnotations:mapView.annotations] And then I want to show again the current user location mapView.showUserLocation = YES But I can only make it reappear as a regular pin, because the userLocation view class its not public so I cant return views of that type. Here is my code - (MKAnnotationView *)mapView:(MKMapView *)theMapView viewForAnnotation:(id <MKAnnotation>)annotation MKPinAnnotationView* annView = (MKPinAnnotationView *)[mapView dequeueReusableAnnotationViewWithIdentifier:@"currentloc"]; if (!annView) { MKPinAnnotationView *annView=[[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@"currentloc"]; annView.pinColor = MKPinAnnotationColorRed; annView.animatesDrop=TRUE; annView.canShowCallout = YES; annView.calloutOffset = CGPointMake(-5, 5); if ([annotation isKindOfClass:[DraggableAnnotationAM class]] ) annView.draggable = YES; return annView; } else { if ([annotation isKindOfClass:[DraggableAnnotationAM class]] ) annView.draggable = YES; annView.annotation = annotation; return annView; } Also I have found through reflection that MKUserLocationView is the class that is used to display the current location, but because its not public its not safe to use and my app keeps crashing and Im sure theres a easier way. Is it possible to do what I want, or should I just never remove the user location annotation of the mapView? Thanks in advance

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  • Facebook redirect after login not working when url is dynamic

    - by dythffvrb
    This is my code: $loginUrl = $facebook->getLoginUrl(array( 'scope' => 'publish_actions', 'redirect_uri' => 'http://mysite.com/', )); It works but if I remove redirect_uri it doesn't work anymore. $loginUrl = $facebook->getLoginUrl(array( 'scope' => 'publish_actions' )); According to Facebook domcumentation redirect_uri is optional. https://developers.facebook.com/docs/reference/php/facebook-getLoginUrl/ Im trying to redirect the users to the same url they were on before logging in. Update: This problem occurs when the url is mysite.com/post23 but when url is mysite.com/staticpage or mysite.com there are no problems Any workarounds? EDIT: It looks like a bug, it doesn't work with certain url in the same site I wil try and report it to Facebook.

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