UITextView链接点击识别被延迟

Question

在iOS 7应用程序中,我有一个UITextView链接,但点击链接不会触发.它只响应尴尬的"轻拍".我希望它在用户点击它时立即响应,就像UIWebView链接点击工作方式一样.这是我的设置:

- (void)viewDidLoad
{
    [super viewDidLoad];

    NSMutableAttributedString *text = [[NSMutableAttributedString alloc] initWithString:@"Lorem ipsum dolor sit er elit lamet, consectetaur cillium adipisicing pecu, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua."];
    [text addAttribute:NSLinkAttributeName value:@"myurl://tapped" range:NSMakeRange(6, 16)];

    self.textView.attributedText = text;
    self.textView.editable = NO;
    self.textView.delaysContentTouches = NO;
}

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange
{
    if ([[URL scheme] isEqualToString:@"myurl"])
    {
        // Handle tap

        return NO;
    }

    return YES;
}

该shouldInteractWithURL方法的Apple文档说明:"如果用户点击或长按URL链接,文本视图将调用此方法".长按工作正常,但水龙头似乎不起作用.

有谁知道怎么让这个立即回应？

Answer 1

如果您仍想使用本机UITextView,可以在文本视图中添加点按识别器,并在点按位置获取字符串属性.找到链接后,您可以立即打开它.

我写了一个Gist解决了iOS 7/8的问题.这是一个轻量级的扩展UITextView,也转发-[UITextViewDelegate textView:shouldInteractWithURL:inRange:]和暴露内部点击手势识别器.

https://gist.github.com/benjaminbojko/c92ac19fe4db3302bd28

这是一个简单的示例:下面的示例仅适用于iOS 8.请参阅上面的要点以获得iOS 7 + 8支持.

添加点击识别器:

// ...

UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tappedTextView:)];
[myTextView addGestureRecognizer:tapRecognizer];
myTextView.selectable = YES; // otherwise the gesture won't recognize

// ...

并添加您的回调:

- (void)tappedTextView:(UITapGestureRecognizer *)tapGesture {
    if (tapGesture.state != UIGestureRecognizerStateEnded) {
        return;
    }

    UITextView *textView = (UITextView *)tapGesture.view;
    CGPoint tapLocation = [tapGesture locationInView:textView];
    UITextPosition *textPosition = [textView closestPositionToPoint:tapLocation];
    NSDictionary *attributes = [textView textStylingAtPosition:textPosition inDirection:UITextStorageDirectionForward];

    NSURL *url = attributes[NSLinkAttributeName];

    if (url) {
        [[UIApplication sharedApplication] openURL:url];
    }
}

而快速版本:

点击识别器:

let tapRecognizer = UITapGestureRecognizer(target: self, action: Selector("tappedTextView:"))
myTextView.addGestureRecognizer(tapRecognizer)
myTextView.selectable = true

打回来:

func tappedTextView(tapGesture: UIGestureRecognizer) {

        let textView = tapGesture.view as! UITextView
        let tapLocation = tapGesture.locationInView(textView)
        let textPosition = textView.closestPositionToPoint(tapLocation)
        let attr: NSDictionary = textView.textStylingAtPosition(textPosition, inDirection: UITextStorageDirection.Forward)

        if let url: NSURL = attr[NSLinkAttributeName] as? NSURL {
            UIApplication.sharedApplication().openURL(url)
        }

        }

Answer 2

是UITextView选择？试试:

self.textView.selectable = YES;

编辑:

我开始认为,与苹果公司所说的相反,长按可能是解决问题的唯一途径.检查此链接,也许会有所帮助.

Answer 3

正如nnarayann所提到的,CCHLinkTextView避免了延迟抽头识别的问题.该库实现了自己的手势识别器,现在可以在1.0版本中使用.