连续触摸 webview 10 秒时如何显示视图？答案

【问题标题】：How to display a view when webview is touched continously for 10 sec?连续触摸 webview 10 秒时如何显示视图？
【发布时间】：2010-09-17 07:33:25
【问题描述】：

我正在 webview 中显示 pub 或 pdf 文件。但我无法检测到 webview 上的触摸。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

当我触摸 pdf 或 pub 文件的任何文本时，将调用上述方法。如何检测对显示 pdf 或 pub 文件的 webview 的点击。

这是我的代码：

- (void)viewDidLoad {
[super viewDidLoad];
NSURL *url = [NSURL URLWithString:@"http://dblog.com.au"];
NSURLRequest *request = [NSURLRequest requestWithURL:url];
[webView loadRequest:request];
UILongPressGestureRecognizer *longPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
longPressGestureRecognizer.minimumPressDuration = 6.0;
[self.webView addGestureRecognizer:longPressGestureRecognizer];
[longPressGestureRecognizer release];

}

- (void)handleLongPress:(UIGestureRecognizer *)gestureRecognizer {
NSLog(@"Long press detected");
 }

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}

请检查一下，是我弄错了吗？

【问题讨论】：

看起来不错，您必须将添加到您的 .h，并设置 longPressGestureRecognizer.delegate = self..

标签： iphone ipad uiwebview touch

【解决方案1】：

尝试类似：

UILongPressGestureRecognizer *longPressGestureRecognizer = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(handleLongPress:)];
longPressGestureRecognizer.minimumPressDuration = 10.0;
[self.webView addGestureRecognizer:longPressGestureRecognizer];
[longPressGestureRecognizer release];

然后：

- (void)handleLongPress:(UIGestureRecognizer *)gestureRecognizer {
    NSLog(@"Long press detected");
}

编辑：

添加这个：

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}

但是在同一个地方长按 10 秒实在是太长了……长按的默认值是 0.4 秒。请记住，如果手指被拖动，则不再是长按..

【讨论】：

@Larsaronen : 有什么方法可以让我确定触摸点的坐标吗？
是的，有 CGPoint tapLocation = [gestureRecognizer locationInView:self.webView];
@Larsaronen ：谢谢我能够确定它。