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POHow to add an action programmatically using Storyboard
 

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  1. POHow to add an action programmatically using Storyboard
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    <p>I have apps on iTunes that use a ViewController as an expandable/zoomable ScrollView with a programmatically added button and action to that button. I am currently updating the app and have switched from building the app using XIBs to using the Storyboard. Both versions 1.0 and this 2.0 version are being built with the same xCode 4.6 platform. I have found some code isn't working the same in several areas and have found work arounds for most, but not for the action to this button. I am trying to add an action programmatically to a button on the ViewController that is programmed. the code that worked in V1.0 is not working with Storyboard. I do not remember using ARC in the V1.0 so I don't know if that is the reason. I would appreciate any help on this matter.</p> <p>Clearly I am not a professional programmer, so it would help to be as clear as possible. Thank You.</p> <p>Goal: I am simply trying to get the ScrollingViewController to Pop Back to the MainViewController or back to the previous VC using the button that is added to the View that is called BackButton.png </p> <p>Here is my code:</p> <pre><code>@interface ZoomingScrollView : UIViewController { IBOutlet UIScrollView *scroller; IBOutlet UIScrollView *imgView; IBOutlet UIButton *myButton; } @property (nonatomic, retain) UIScrollView *scroller; @property (nonatomic, retain) UIScrollView *imgView; @property (nonatomic, retain) UIButton *myButton; @end </code></pre> <hr> <pre><code>@implementation -(void) loadView{ //Image View Scrollable UIImageView *imgView =[[[UIImageView alloc]initWithImage:[UIImage imageNamed:@"ZoomingImage.png"]]autorelease]; imgView.tag = 100; UIScrollView *scroller = [[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)]autorelease]; scroller.delegate = self; scroller.minimumZoomScale = 0.25; scroller.maximumZoomScale = 3.0; scroller.bounces=NO; scroller.showsHorizontalScrollIndicator=YES; scroller.showsVerticalScrollIndicator=YES; scroller.contentSize = imgView.frame.size; scroller.contentOffset =CGPointMake((imgView.frame.size.width-1024)/2, (imgView.frame.size.height-768)/2); [scroller addSubview:imgView]; self.view = scroller; //Button Controls UIButton *myButton=[UIButton buttonWithType:UIButtonTypeCustom]; myButton.frame = CGRectMake(0, 20, 60, 40); [myButton setTitle:@"goBack" forState:UIControlStateNormal]; [myButton setBackgroundImage:[UIImage imageNamed:@"BackButton.png"] forState:UIControlStateNormal]; [myButton addTarget:self action:@selector(goBack:) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:myButton]; } -(UIView*) viewForZoomingInScrollView: (UIScrollView *) scrollView{ return [self.view viewWithTag:100]; } </code></pre> <p>Thanks again. </p>
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    1. COcan you explain in details what exactly is not working?
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    2. COYes, When I Run the app in the Simulator, the VC comes up as expected, scrolls and zooms as expected, and the Button shows in the upper left corner as expected. When I tap on the programmed "BackButton" the app crashes and I get this in the DebugConsole.
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    3. COZoomingScrollView goBack:]: unrecognized selector sent to instance 0x9a33e50 2013-12-20 15:53:35.626 ScrollableViewApp[1467:14003] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[ZoomingScrollView goBack:]: unrecognized selector sent to instance 0x9a33e50' *** First throw call stack: (0x1bfd012 0x15aae7e 0x1c884bd 0x1becbbc 0x1bec94e 0x15be705 0x4f22c0 0x4f2258 0x5b3021 0x5b357f 0x5b26e8 0x7b61d3 0x1bc5afe 0x1bc5a3d 0x1ba37c2 0x1ba2f44 0x1ba2e1b 0x2a677e3 0x2a67668 0x4eeffc 0x25c2 0x24f5 0x1) libc++abi.dylib: terminate called throwing an exception (lldb)
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