MNM MNM - 4 months ago 41
Swift Question

swift Turn a generated imageView into a UIButton in code

I am trying to add a tap gesture to a generated Image and it works ok but keeps crashing the program once I click on the image. What did I do wrong here. Any help is appreciated.

let tapGesture = UITapGestureRecognizer(target: self, action: "image Tapped")
let imageView = UIImageView(image: UIImage(data: data));
imageView.addGestureRecognizer(tapGesture)
imageView.userInteractionEnabled = true


This is the error I get

2016-07-12 09:19:30.241 XXX[2170:27661] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: ‘-[MyViewController image Tapped]: unrecognized selector sent to instance 0x7fe811e30560'
*** First throw call stack:
(
0 CoreFoundation 0x000000010e2a7d85 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000011144ddeb objc_exception_throw + 48
2 CoreFoundation 0x000000010e2b0d3d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x000000010e1f6cfa ___forwarding___ + 970
4 CoreFoundation 0x000000010e1f68a8 _CF_forwarding_prep_0 + 120
5 UIKit 0x0000000110391b28 _UIGestureRecognizerSendTargetActions + 153
6 UIKit 0x000000011038e19a _UIGestureRecognizerSendActions + 162
7 UIKit 0x000000011038c197 -[UIGestureRecognizer _updateGestureWithEvent:buttonEvent:] + 843
8 UIKit 0x0000000110394655 ___UIGestureRecognizerUpdate_block_invoke898 + 79
9 UIKit 0x00000001103944f3 _UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 342
10 UIKit 0x0000000110381e75 _UIGestureRecognizerUpdate + 2634
11 UIKit 0x000000010ff0e48e -[UIWindow _sendGesturesForEvent:] + 1137
12 UIKit 0x000000010ff0f6c4 -[UIWindow sendEvent:] + 849
13 UIKit 0x000000010febadc6 -[UIApplication sendEvent:] + 263
14 UIKit 0x000000010fe94553 _UIApplicationHandleEventQueue + 6660
15 CoreFoundation 0x000000010e1cd301 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
16 CoreFoundation 0x000000010e1c322c __CFRunLoopDoSources0 + 556
17 CoreFoundation 0x000000010e1c26e3 __CFRunLoopRun + 867
18 CoreFoundation 0x000000010e1c20f8 CFRunLoopRunSpecific + 488
19 GraphicsServices 0x0000000112d68ad2 GSEventRunModal + 161
20 UIKit 0x000000010fe99f09 UIApplicationMain + 171
21 ApivitaClient 0x000000010d6a1482 main + 114
22 libdyld.dylib 0x0000000111f1192d start + 1
23 ??? 0x0000000000000001 0x0 + 1


)
libc++abi.dylib: terminating with uncaught exception of type NSException
(lldb)

Answer

replace

let tapGesture = UITapGestureRecognizer(target: self, action: "image Tapped")

with

let tapGesture = UITapGestureRecognizer(target: self, action: #selector(self.imageTapped))

and create func imageTapped

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