xcode 是否可以将 UITapGestureRecognizer 附加到 UILabel 子类
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Is it possible to attach UITapGestureRecognizer to UILabel subclass
提问by Michael
I'm trying to attach gesture recognizer to my own class which is subclass of UILabel, but it does not work. Can you help me to understand what's wrong in the code
我正在尝试将手势识别器附加到我自己的类，它是 UILabel 的子类，但它不起作用。你能帮我理解代码中有什么问题吗
@interface Card : UILabel {
}
- (void) addBackSideWord;
@end
#import "Card.h"
@implementation Card
- (id)initWithFrame:(CGRect)frame {
if ((self = [super initWithFrame:frame])) {
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc]
initWithTarget:self action:@selector(addBackSideWord)];
[tapRecognizer setNumberOfTouchesRequired:2];
[tapRecognizer setDelegate:self];
[self addGestureRecognizer:tapRecognizer];
}
return self;
}
- (void) addBackSideWord {
//do something
}
@end
回答by Vladimir
Your code should work fine, the only thing you may need to fix is that user interaction is disabled for UILabel by default, so gesture recogniser does not receive any touch events. Try manually enable it by adding this line to your code (e.g. in init method):
您的代码应该可以正常工作，您可能需要解决的唯一问题是默认情况下 UILabel 的用户交互是禁用的，因此手势识别器不会收到任何触摸事件。尝试通过将此行添加到您的代码（例如在 init 方法中）来手动启用它：
self.userInteractionEnabled = YES;
回答by Jhaliya
Yes, that's possible,Any class inheritedfrom UIView.
是的，这是可能的，任何继承自UIView.
Do'nt forget to enable user interaction.
不要忘记启用用户交互。
self.userInteractionEnabled = YES;
回答by Kupendiran iOS
You can use below code to add tap gesture on UILable :-
您可以使用以下代码在 UILable 上添加点击手势：-
Step 1:
第1步：
Delegate "UIGestureRecognizerDelegate" to your viewcontroller.h
for example:
@interface User_mail_List : UIViewController<UIGestureRecognizerDelegate>
Step 2:
第2步：
//create you UILable
UILabel *title_lbl= [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 100, 30)];
[title_lbl setText:@"u&me"];
[title_lbl setUserInteractionEnabled:YES];
[yourView addSubview:title_lbl];
Step 3:
第 3 步：
UITapGestureRecognizer *tap= [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(Prof_lbl_Pressed:)];//your action selector
[tap setNumberOfTapsRequired:1];
title_lbl.userInteractionEnabled= YES;
[title_lbl addGestureRecognizer:tap];
Step 4:
第四步：
-(void)Prof_lbl_Pressed:(id)sender{
//write your code action
}
thanks,
谢谢，
