如何在UIControlEvents上添加UITableViewCell

Question

我想知道如何将UIControlEvent添加到UITableViewCell中？我不能在addTarget:action:forControlEvents上使用UITableViewCell方法。我不能使用didSelectCellAtIndexPath:，因为我需要知道UIControlEventTouchDown和UIControlEventTouchUpInside。我怎样才能做到这一点？

谢谢!

Answer 1

编辑:另一个选项是公开您的单元格上的UIButton属性，在cellForRowAtIndexPath中:在单元格的按钮上调用addTarget:action:forControlEvent:，传递您希望在触摸时被调用的视图控制器上的self和方法。这就排除了对委托协议的任何需要。唯一的问题是，在对单元格的按钮设置目标操作之前，请确保调用：

[cell.button removeTarget:nil 
               action:NULL 
     forControlEvents:UIControlEventAllEvents]; 

由于单元格(和它的按钮)被重用，您需要调用它，以确保您没有在按钮上堆叠目标操作。

Answer 2

我认为最干净的解决方案是定义一个自定义UIGestureRecognizer并将其添加到UITableViewCell中。

MDGestureRec.h

#import <UIKit/UIKit.h>
#import <UIKit/UIGestureRecognizerSubclass.h>

@interface MDGestureRec : UIGestureRecognizer

- (void)reset;
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;

@end

// ------

MDGestureRec.m

#import "MDGestureRec.h"

@implementation MDGestureRec

- (void)reset { }
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    NSLog(@"touches %@", [touches description]);
    NSLog(@"touchesBegan %@", [event description]);
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { }
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { }
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event { }

@end

// ------

    MDGestureRec *g = [[MDGestureRec alloc] init];

    [cell addGestureRecognizer:g];