代码之家 › 专栏 › 技术社区 › pajevic

在UITextView中点击NSLinkAttributeName链接在iOS 9中不起作用

nsattributedstring ios9 uitextview objective-c ios

pajevic · 技术社区 · 8 年前

我有一个 UITextView

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"This is a message.\nClick here for more info"];
textView.linkTextAttributes = @{NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle)};
NSRange linkRange = [attributedString.string rangeOfString:@"Click here for more info"];
[attributedString addAttribute:NSLinkAttributeName value:@"" range:linkRange];
textView.attributedText = attributedString;
UITapGestureRecognizer *tapRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(infoTapped:)];
[textView addGestureRecognizer:tapRecognizer

然后我听到一个像这样的水龙头:

- (void)infoTapped:(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];
    NSString *link = attributes[NSLinkAttributeName];

    if (link) {
        // Do stuff
    }
}

在iOS 10中,这很好,我能够检测到 NSLinkAttributeName 属性 [textView closestPositionToPoint:tapLocation] 退货 nil 从那以后我什么都做不了。

editable 和 selectable 设置为否。我知道有人这么说 selctable

1 回复 | 直到 8 年前

Stas Volskiy 8 年前

为什么要使用点击手势选择链接?UITextView具有完善的链接识别功能。我无法回答为什么你的解决方案在iOS 9上不能正常工作,但我可以建议你用另一种方式处理链接。这也适用于iOS 9。

    NSMutableAttributedString *str = [[NSMutableAttributedString alloc] initWithString:@"This is a message.\nClick here for more info" attributes:nil];
NSRange range = [str.string rangeOfString:@"Click here for more info"];
// add a value to link attribute, you'll use it to determine what link is tapped
[str addAttribute:NSLinkAttributeName value:@"ShowInfoLink" range:range];
self.textView.linkTextAttributes = @{NSUnderlineStyleAttributeName : @(NSUnderlineStyleSingle)};
self.textView.attributedText = str;
// set textView's delegate
self.textView.delegate = self;

- (BOOL)textView:(UITextView *)textView shouldInteractWithURL:(NSURL *)URL inRange:(NSRange)characterRange interaction:(UITextItemInteraction)interaction
{
    if ([URL.absoluteString isEqualToString:@"ShowInfoLink"]) {
        // Do something
    }
    return NO;
}

要使其工作,您必须设置selectable=YES,并在情节提要中选中links标志,以便能够检测链接。

推荐文章

sudoExclamationExclamation · iOS自动布局-高度不能小于ThanOrEqualTo

1 年前