有人有替代 UILongPressGestureRecognizer 的代码吗？

发布于 2024-10-10 18:19:47 字数 119 浏览 3 评论 0原文

我想支持 3.2 之前的版本，这是唯一不想合作的符号，有人知道一些 Touchmove 代码或我可以用来代替 UILongPressGestureRecognizer 的东西吗？

谢谢，

尼克

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怪我入戏太深 2024-10-17 18:19:48

如您所知，对于 3.2 之前的 iOS，您应该使用 TouchBegan、Moved、Ended 和 Canceled 函数。
我认为只实现touchesMoved是不好的，因为如果用户按下并且在释放之前根本不移动，那么touchesMoved将永远不会被调用。

相反，我使用 NSTimer 来实现长按触摸事件。
这可能不是最佳解决方案，但它对我的应用程序运行良好。
这是一段代码。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    isAvailable = NO;
    timer = [NSTimer scheduledTimerWithTimeInterval:DURATION target:self selector:@selector(didPassTime:) userInfo:nil repeats:NO];
}

- (void)didPassTime:(id)sender{
    isAvailable = YES;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    if(isAvailable == YES){
        // still pressing after 0.5 seconds 
    }
    else{
        // still pressing before 0.5 seconds
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    if(isAvailable == YES){
        // releasing a finger after 0.5 seconds
    }
    else {
        // releasing a finger before 0.5 seconds
            [timer invalidate];
            timer = nil;
    }



}

As you know, you should use touchesBegan, Moved, Ended, and Canceled functions for pre 3.2 iOS.
I think implementing only touchesMoved is bad because if the user presses and doesn't move at all until releasing, then touchesMoved won't get called ever.

Instead, I used NSTimer to acheive a long press touch event.
This might not be an optimal solution, but it worked well for my app.
Here's a snippet of code.

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
    isAvailable = NO;
    timer = [NSTimer scheduledTimerWithTimeInterval:DURATION target:self selector:@selector(didPassTime:) userInfo:nil repeats:NO];
}

- (void)didPassTime:(id)sender{
    isAvailable = YES;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{
    if(isAvailable == YES){
        // still pressing after 0.5 seconds 
    }
    else{
        // still pressing before 0.5 seconds
    }
}

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    if(isAvailable == YES){
        // releasing a finger after 0.5 seconds
    }
    else {
        // releasing a finger before 0.5 seconds
            [timer invalidate];
            timer = nil;
    }



}

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