UITapGestureRecognizer Singletap崩溃

Question

这是我的ViewController的样子-

#import "DialogViewController.h"



 @interface DialogViewController ()

 @end

 @implementation DialogViewController

 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
 {
     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
     if (self) {
         // Custom initialization
     }
     return self;
 }

 - (void)viewDidLoad
 {
     [super viewDidLoad];

      UITapGestureRecognizer *singleTapGestureRecognizer = [[UITapGestureRecognizer alloc]
                                                           initWithTarget:self
                                                           action:@selector(handleSingleTap:)];
     [singleTapGestureRecognizer setNumberOfTapsRequired:1];
     [self.view addGestureRecognizer:singleTapGestureRecognizer];}

 - (void)handleSingleTap:(UITapGestureRecognizer *)recognizer {
     NSLog (@"Tap");
 }

 - (void)didReceiveMemoryWarning
 {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }

 @end

这是使用以下命令从另一个视图实例化和显示的-

 DialogViewController *dialogViewController = [[DialogViewController alloc]initWithNibName:@"DialogViewController" bundle:nil];
    [self.parentViewController.view addSubview: dialogViewController.view];

如果我点击一下，我的应用程序就会在EXC_BAD_ACCESS KERN_INVALID_ADDRESS上崩溃。我的视图没有任何花哨的东西，它只有一张正确显示的图像。我是iOS开发的新手，我确信在这里我正在做一些愚蠢的事情。感谢您的指点。

Answer 1

当内存被释放，代码试图访问无效的memory.Little时，就会出现EXC_BAD_ACCESS KERN_INVALID_ADDRESS。更多的代码将有助于你如何分配视图controller.But，我认为你应该检查一下视图控制器，它是如何被释放的。

保持对视图控制器的强引用，因为您的视图控制器正在从tap中释放位置，并且当您使用视图控制器时，它找不到指针。

Answer 2

试试self.view.window

[self.view.window addGestureRecognizer:singleTapGestureRecognizer];