Question

在UITextview中按下触摸更长时间放大镜出现时。我怎样才能禁用它。

Answer 1

最后这个问题也解决了

以下是任何人需要的参考代码

在子文件UITextview的m文件中添加了代码

-(void)addGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
{
    //Prevent zooming but not panning
    if ([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]]) 
    {
        gestureRecognizer.enabled = NO;
    }
    [super addGestureRecognizer:gestureRecognizer];
    return;
}

有效。

Answer 2

这对我有用

@implementation CustomTextView 

- (NSArray *)selectionRectsForRange:(UITextRange *)range
{
    self.selectedTextRange = nil;
    return nil;
}

- (void)addGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    gestureRecognizer.delegate = self;

    [super addGestureRecognizer:gestureRecognizer];
    return;
}

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
    return NO;
}

- (CGRect)caretRectForPosition:(UITextPosition *)position
{
    return [super caretRectForPosition:self.endOfDocument];
}


- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch
{
    if (([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]] && !gestureRecognizer.delaysTouchesEnded))
    {
        return NO;
    }
    else
        return YES;

}

Answer 3

Xamarin.iOS：

创建自定义UITextView
在requireAuth上覆盖function requireAuth(allowProxyLogin) { return [ (req, res, next) => { req.allowProxyLogin = !!allowProxyLogin; return next(); }, passport.authenticate('jwt', { session: false, passReqToCallback: true }), ]; }方法

GestureRecognizerShouldBegin

Answer 4

@Irina的答案部分工作（尝试轻按，然后长按，你将有一个放大叠加），适用于iOS 9.x，并在iOS 10上崩溃，具体如下：

***由于未捕获的异常'NSInvalidArgumentException'终止应用程序，原因：'您无法更改委托 UIViewControllerPreviewing失败关系手势识别器“

以下代码适用于iOS 9.x和10.x，我能想到的每个轻拍和/或长手势组合。

注意我不保证Apple的评论会接受。

@implementation CustomTextView

- (void)addGestureRecognizer:(UIGestureRecognizer *)gestureRecognizer
{
    NSArray *allowedGestures = @[ @"UILongPressGestureRecognizer", @"UIScrollViewDelayedTouchesBeganGestureRecognizer", @"UIScrollViewPanGestureRecognizer" ];

    if (![allowedGestures containsObject:NSStringFromClass([gestureRecognizer class])])
    {
        return;
    }

    if (([gestureRecognizer isKindOfClass:[UILongPressGestureRecognizer class]] && !gestureRecognizer.delaysTouchesEnded))
    {
        return;
    }

    [super addGestureRecognizer:gestureRecognizer];
}

@end

我们需要UIScrollViewDelayedTouchesBeganGestureRecognizer和UIScrollViewPanGestureRecognizer才能保持UITextView滚动功能。这两个类都是私有API 的一部分，因此请自行承担风险。

Answer 5

@ user1120133的答案的Swift 4版本：

    override func addGestureRecognizer(_ gestureRecognizer: UIGestureRecognizer) {
      //Prevent long press to show the magnifying glass
      if gestureRecognizer is UILongPressGestureRecognizer {
        gestureRecognizer.isEnabled = false
      }

      super.addGestureRecognizer(gestureRecognizer)
    }

在UITextview中禁用放大镜

5 个答案: