Question

如果用户单次触摸，我想执行一个操作，如果用户在UITableView Cell上进行双击，我想执行另一个操作。

我尝试了这个问题中提到的多种方法。

How can I detect a double tap on a certain cell in UITableView?

但是每一种方法，我都无法正确区分单击和双击。我的意思是，在每次双击中，它也会发生一次点击。因此，每次单击操作也会发生双击。

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
FeedCell *myCell = (FeedCell*) [self.tblView cellForRowAtIndexPath:indexPath];

NSLog(@"clicks:%d", myCell.numberOfClicks);

if (myCell.numberOfClicks == 2) {
    NSLog(@"Double clicked");
}
else{

    NSLog(@"Single tap");
}
}

这样做的正确方法是什么？

Answer 1

我希望您在didSelectRowAtIndexPath行动时不要使用double tap。使用single TapGesture代替didSelectRowAtIndexPath。您在didSelectRowAtIndexPath中编写的任何代码，都将使用single tap选择器方法编写。

示例：实现单手势和双手势，如下所示。

UITapGestureRecognizer *singleTap = [[[UITapGestureRecognizer alloc] initWithTarget: self action:@selector(doSingleTap)] autorelease];
singleTap.numberOfTapsRequired = 1; 
[self.view addGestureRecognizer:singleTap];

UITapGestureRecognizer *doubleTap = [[[UITapGestureRecognizer alloc] initWithTarget: self action:@selector(doDoubleTap)] autorelease];
doubleTap.numberOfTapsRequired = 2; 
[self.view addGestureRecognizer:doubleTap];

[singleTap requireGestureRecognizerToFail:doubleTap];

Answer 2

根据答案 - 您的单击将处理定时器点火方法。点击此处点按

- (void)tapTimerFired:(NSTimer *)aTimer{
    //timer fired, there was a single tap on indexPath.row = tappedRow
    if(tapTimer != nil){
        tapCount = 0;
        tappedRow = -1;
    }
}

并双击将在didSelectRowAtIndexPath处理完全如下所示：

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    //checking for double taps here
    if(tapCount == 1 && tapTimer != nil && tappedRow == indexPath.row){
        //double tap - Put your double tap code here
        [tapTimer invalidate];
        [self setTapTimer:nil];
    }
    else if(tapCount == 0){
        //This is the first tap. If there is no tap till tapTimer is fired, it is a single tap
        tapCount = tapCount + 1;
        tappedRow = indexPath.row;
        [self setTapTimer:[NSTimer scheduledTimerWithTimeInterval:0.2 target:self selector:@selector(tapTimerFired:) userInfo:nil repeats:NO]];
    }
    else if(tappedRow != indexPath.row){
        //tap on new row
        tapCount = 0;
        if(tapTimer != nil){
            [tapTimer invalidate];
            [self setTapTimer:nil];
        }
    }
}

您只需声明两个属性

@property (nonatomic, assign) NSInteger tapCount;
@property(nonatomic, assign) NSInteger tappedRow;

这是完全有效的代码段。

检测UITableViewCell上的双击问题

2 个答案: