[UITapGestureRecognizer标签]：无法识别的选择器发送到实例 [英] [UITapGestureRecognizer tag]: unrecognized selector sent to instance

问题描述

我安排了一系列 imageview ，并为其分配 TapView 识别器

I am having a series of imageview arranged, and assigning a TapView recognizer to it

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
                                         initWithTarget:self action:@selector(action:)];
[tapRecognizer setNumberOfTouchesRequired:1];
[tapRecognizer setDelegate:self];
imageView.userInteractionEnabled = YES;
[imageView addGestureRecognizer:tapRecognizer];

我将选择器定义为：

-(void) action:(id)sender
  {
    NSLog(@"TESTING TAP");
    NSLog (@"%d",[sender tag]);
  }

这是崩溃，我收到错误信息： -

This is getting Crashed and i am getting Error message as:-

[UITapGestureRecognizer tag]：无法识别的选择器发送到实例0x145d0210

推荐答案

你可以使用它..

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
                                         initWithTarget:self action:@selector(action:)];
[tapRecognizer setNumberOfTouchesRequired:1];
[tapRecognizer setDelegate:self];
imageView.userInteractionEnabled = YES;
imageView.tag = 1111;
[imageView addGestureRecognizer:tapRecognizer];

在行动中尝试这个..

And in action try this..

-(void) action:(id)sender
  {
    NSLog(@"TESTING TAP");
    UITapGestureRecognizer *tapRecognizer = (UITapGestureRecognizer *)sender;
    NSLog (@"%d",[tapRecognizer.view tag]);
  }

解释：

UITapGestureRecognizer 没有像标签这样的属性。但是它有属性 view ，你可以从这个属性访问附加了 UITapGestureRecognizer 的视图。

UITapGestureRecognizer has not property like tag. but it has property view, from this property you can access the view with which UITapGestureRecognizer was attached.

希望它能帮到你

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