Ios 聚焦时崩溃
我正在使用一个iOS应用程序，但由于某种原因，我的登录页面突然停止工作。除了我用于用户名的UITextField（Password textField）之外，所有的uielement都工作正常 登录屏幕非常基本，它有一个viewcontroller，用户名文本字段在该viewcontroller中有一个出口 当文本字段聚焦时，我不会对其进行任何处理。 它发生在物理ipad2的iOS8和iphone4s模拟器上 我试图做的是：Ios 聚焦时崩溃,ios,objective-c,iphone,Ios,Objective C,Iphone,我正在使用一个iOS应用程序，但由于某种原因，我的登录页面突然停止工作。除了我用于用户名的UITextField（Password textField）之外，所有的uielement都工作正常 登录屏幕非常基本，它有一个viewcontroller，用户名文本字段在该viewcontroller中有一个出口 当文本字段聚焦时，我不会对其进行任何处理。 它发生在物理ipad2的iOS8和iphone4s模拟器上 我试图做的是： 重新安装应用程序 重新广告文本字段 重新连接插座 将我的故事板还原为
- 重新安装应用程序
- 重新广告文本字段
- 重新连接插座
- 将我的故事板还原为工作版本
2015-03-24 11:13:53.695 App[43084:866627] -[__NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x7ae5f920
2015-03-24 11:13:53.726 App[43084:866627] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x7ae5f920'
*** First throw call stack:
(
0 CoreFoundation 0x00def466 __exceptionPreprocess + 182
1 libobjc.A.dylib 0x006d7a97 objc_exception_throw + 44
2 CoreFoundation 0x00df72c5 -[NSObject(NSObject) doesNotRecognizeSelector:] + 277
3 CoreFoundation 0x00d3fbc7 ___forwarding___ + 1047
4 CoreFoundation 0x00d3f78e _CF_forwarding_prep_0 + 14
5 CoreFoundation 0x00cc531c CFArrayGetValueAtIndex + 188
6 CoreFoundation 0x00d601ed CFStringTokenizerCreate + 749
7 UIKit 0x01c377ce __91-[_UITextInputControllerTokenizer _getClosestTokenRangeForPosition:granularity:downstream:]_block_invoke44 + 264
8 UIFoundation 0x0439e9d3 -[NSTextStorage coordinateReading:] + 51
9 UIKit 0x01c37459 -[_UITextInputControllerTokenizer _getClosestTokenRangeForPosition:granularity:downstream:] + 276
10 UIKit 0x018ba567 -[UITextInputStringTokenizer positionFromPosition:toBoundary:inDirection:] + 93
11 UIKit 0x018bad9d -[TIDocumentState(UITextInputAdditions) _contextBeforePosition:inDocument:] + 81
12 UIKit 0x018baef3 -[TIDocumentState(UITextInputAdditions) initWithDocument:] + 125
13 UIKit 0x018ba95f +[TIDocumentState(UITextInputAdditions) documentStateOfDocument:] + 63
14 UIKit 0x015fad7b -[UIKeyboardImpl syncDocumentStateToInputDelegateWithExecutionContext:] + 298
15 UIKit 0x015fb787 -[UIKeyboardImpl updateForChangedSelectionWithExecutionContext:] + 326
16 UIKit 0x015f57b6 __36-[UIKeyboardImpl setDelegate:force:]_block_invoke + 43
17 UIKit 0x01c384b2 -[UIKeyboardTaskQueue continueExecutionOnMainThread] + 404
18 UIKit 0x01c38b6f -[UIKeyboardTaskQueue addTask:] + 144
19 UIKit 0x015f5783 -[UIKeyboardImpl setDelegate:force:] + 2450
20 UIKit 0x015f4dec -[UIKeyboardImpl setDelegate:] + 60
21 UIKit 0x01928fe5 -[UIPeripheralHost(UIKitInternal) _reloadInputViewsForResponder:] + 1096
22 UIKit 0x01570687 -[UIResponder(UIResponderInputViewAdditions) reloadInputViews] + 316
23 UIKit 0x0156f6ec -[UIResponder becomeFirstResponder] + 562
24 UIKit 0x01435ba0 -[UIView(Hierarchy) becomeFirstResponder] + 114
25 UIKit 0x01c04607 -[UITextField becomeFirstResponder] + 51
26 UIKit 0x018051bf -[UITextInteractionAssistant(UITextInteractionAssistant_Internal) setFirstResponderIfNecessary] + 200
27 UIKit 0x018077e6 -[UITextInteractionAssistant(UITextInteractionAssistant_Internal) oneFingerTap:] + 2762
28 UIKit 0x017fb057 _UIGestureRecognizerSendActions + 327
29 UIKit 0x017f98d4 -[UIGestureRecognizer _updateGestureWithEvent:buttonEvent:] + 561
30 UIKit 0x017fb91d -[UIGestureRecognizer _delayedUpdateGesture] + 60
31 UIKit 0x017ff29a ___UIGestureRecognizerUpdate_block_invoke661 + 57
32 UIKit 0x017ff15d _UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 317
33 UIKit 0x017f3066 _UIGestureRecognizerUpdate + 3720
34 UIKit 0x0140ac5b -[UIWindow _sendGesturesForEvent:] + 1356
35 UIKit 0x0140babf -[UIWindow sendEvent:] + 769
36 UIKit 0x013d0bb1 -[UIApplication sendEvent:] + 242
37 UIKit 0x013e0bf6 _UIApplicationHandleEventFromQueueEvent + 21066
38 UIKit 0x013b4bc7 _UIApplicationHandleEventQueue + 2300
39 CoreFoundation 0x00d1298f __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 15
40 CoreFoundation 0x00d0849d __CFRunLoopDoSources0 + 253
41 CoreFoundation 0x00d079f8 __CFRunLoopRun + 952
42 CoreFoundation 0x00d0737b CFRunLoopRunSpecific + 443
43 CoreFoundation 0x00d071ab CFRunLoopRunInMode + 123
44 GraphicsServices 0x04e182c1 GSEventRunModal + 192
45 GraphicsServices 0x04e180fe GSEventRun + 104
46 UIKit 0x013b89b6 UIApplicationMain + 1526
47 App 0x0005ffbd main + 141
48 libdyld.dylib 0x0296dac9 start + 1
49 ??? 0x00000001 0x0 + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
#import "LoginViewController.h"
@implementation LoginViewController
UserManager *usermanager;
- (void)viewDidLoad
{
[super viewDidLoad];
}
- (IBAction)cancelLogin:(id)sender {
[self dismissViewControllerAnimated:true completion:nil];
}
- (IBAction)login:(id)sender {
[loginIndicator startAnimating];
LoginHandler *loginhandler = [[LoginHandler alloc]initWithUsername:usernameField.text
password:passwordField.text
beta:betaSwitch.isOn
view:self];
[loginhandler loginUser];
}
-(void)resetFields{
usernameField.text = @"";
passwordField.text = @"";
[loginIndicator stopAnimating];
}
@end
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import "LoginHandler.h"
@interface LoginViewController : UIViewController{
__weak IBOutlet UITextField *usernameField;
__weak IBOutlet UITextField *passwordField;
__weak IBOutlet UIActivityIndicatorView *loginIndicator;
__weak IBOutlet UISwitch *betaSwitch;
__weak IBOutlet UINavigationBar *navigationBar;
}
-(void)resetFields;
@end
谢谢我似乎找到了答案，因为某种原因，这与我的限制有关。我清除了约束并重新添加了它们，不知何故它又开始工作了 调试时它会崩溃吗？如果是，您应该在崩溃时在控制台中看到错误消息-这通常非常有用您是对的，完全忘记了添加itTry来查找行。似乎您正在操作一个
NSStringNSArray2015-03-24 11:43:41.338 App[323:15867] -[__NSCFString objectAtIndex:]: unrecognized selector sent to instance 0x15653690