编辑：我已经确定我的旧布局是糟糕的用户体验设计并且已经改变。我不再需要在UITextFields中拥有UITableViewCell。
我有一个包含两个UITableViewCell的自定义UITextFields
我可以滚动得很好并选择，或将选择更改为任何其他文本字段，但当我按下键盘上的任何按钮时，我会崩溃。这发生在模拟器和真实设备上。我可以将内容粘贴到文本字段
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[NSNull >ength]: unrecognized selector sent to instance 0x1066deaf0'
** First throw call stack:
0 CoreFoundation 0x00000001064b9e65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001081f9deb objc_exception_throw + 48
2 CoreFoundation 0x00000001064c248d -[NSObject(NSObject) doesNotRecognizeSelector:] + 205
3 CoreFoundation 0x000000010640f90a ___forwarding___ + 970
4 CoreFoundation 0x000000010640f4b8 _CF_forwarding_prep_0 + 120
5 CoreFoundation 0x0000000106391dfa CFStringCompareWithOptionsAndLocale + 202
6 Foundation 0x000000010684ce37 -[NSString compare:options:range:] + 29
7 UIKit 0x0000000106fc0e6f -[UIPhysicalKeyboardEvent _matchesKeyCommand:] + 303
8 UIKit 0x0000000106ee53fd -[UIResponder _keyCommandForEvent:target:] + 364
9 UIKit 0x0000000106ee55b2 -[UIResponder _keyCommandForEvent:target:] + 801
10 UIKit 0x0000000106ee55b2 -[UIResponder _keyCommandForEvent:target:] + 801
11 UIKit 0x0000000106ee55b2 -[UIResponder _keyCommandForEvent:target:] + 801
12 UIKit 0x0000000106ee55b2 -[UIResponder _keyCommandForEvent:target:] + 801
13 UIKit 0x0000000106ee55b2 -[UIResponder _keyCommandForEvent:target:] + 801
14 UIKit 0x0000000106cf791a -[UIApplication _handleKeyUIEvent:] + 948
15 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
16 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
17 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
18 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
19 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
20 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
21 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
22 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
23 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
24 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
25 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
26 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
27 UIKit 0x0000000106ee5e53 -[UIResponder _handleKeyUIEvent:] + 79
28 UIKit 0x0000000106cf72cd -[UIApplication handleKeyUIEvent:] + 79
29 UIKit 0x0000000106f8dc83 -[UIKeyboardImpl _handleKeyEvent:executionContext:] + 66
30 UIKit 0x000000010718dcde -[UIKeyboardLayoutStar completeRetestForTouchUp:timestamp:interval:executionContext:] + 3356
31 UIKit 0x0000000106f9cbbd __28-[UIKeyboardLayout touchUp:]_block_invoke + 228
32 UIKit 0x00000001076e9724 -[UIKeyboardTaskQueue continueExecutionOnMainThread] + 332
33 UIKit 0x0000000106f9cace -[UIKeyboardLayout touchUp:] + 236
34 UIKit 0x0000000106f9d614 -[UIKeyboardLayout touchesEnded:withEvent:] + 348
35 UIKit 0x0000000106d4749b -[UIWindow _sendTouchesForEvent:] + 835
36 UIKit 0x0000000106d481d0 -[UIWindow sendEvent:] + 865
37 UIKit 0x0000000106cf6b66 -[UIApplication sendEvent:] + 263
38 UIKit 0x0000000106cd0d97 _UIApplicationHandleEventQueue + 6844
39 CoreFoundation 0x00000001063e5a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
40 CoreFoundation 0x00000001063db95c __CFRunLoopDoSources0 + 556
41 CoreFoundation 0x00000001063dae13 __CFRunLoopRun + 867
42 CoreFoundation 0x00000001063da828 CFRunLoopRunSpecific + 488
43 GraphicsServices 0x000000010a6a5ad2 GSEventRunModal + 161
44 UIKit 0x0000000106cd6610 UIApplicationMain + 171
45 APP NAME 0x0000000105acf65d main + 109
46 libdyld.dylib 0x0000000108d0b92d start + 1
47 ??? 0x0000000000000001 0x0 + 1
我的UITableViewController被设为我UITextFields的代理人。
func textFieldDidBeginEditing(textField: UITextField) {
print("Did Begin Editing")
}
func textField(textField: UITextField, shouldChangeCharactersInRange range: NSRange, replacementString string: String) -> Bool {
print("Should Change Char")
return true
}
是否已开始编辑，但应更改char不是。