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我正在使用 handleLongPressGesture 添加注释并在我的 MapView 旁边创建一个文本字段。我的问题是，当我插入子视图时，该函数只被调用一次： [self createTextfieldForPin:myString :x :y];

有谁知道，为什么？如果没有该功能，每次都会调用handleLongPressGesture-function，当我做一个长按时......

这是我的完整代码：

-(void)handleLongPressGesture:(UIGestureRecognizer*)sender
{
    // This is important if you only want to receive one tap and hold event
    if (sender.state == UIGestureRecognizerStateEnded)
    {
        //[self.mapView removeGestureRecognizer:sender];

 //       [self.mapView removeAnnotations:[self.mapView annotations]];
    }
    else
    {

        // Here we get the CGPoint for the touch and convert it to latitude and longitude coordinates to display on the map
        CGPoint point = [sender locationInView:self.mapView];
        CLLocationCoordinate2D locCoord = [self.mapView convertPoint:point toCoordinateFromView:self.mapView];
        // Then all you have to do is create the annotation and add it to the map
        UserAnnotation *dropPin = [[UserAnnotation alloc] initWithCoordinate:locCoord];
        [self.mapView addAnnotation:dropPin];

        //create NSString from coordinate
        NSNumberFormatter *fmt = [[NSNumberFormatter alloc] init];
        [fmt setMaximumFractionDigits:2];
        NSString *myString = [[NSString alloc]initWithFormat:@"%@ / %@",[fmt stringFromNumber:[NSNumber numberWithFloat:locCoord.latitude]],[fmt stringFromNumber:[NSNumber numberWithFloat:locCoord.longitude]]];

      [self createTextfieldForPin:myString :x :y];
    }
}

**编辑

-(void)createTextfieldForPin:(NSString *)coordinates: (CGFloat) _x: (CGFloat) _y
{
    self.label = [[UILabel alloc]initWithFrame:CGRectMake(x, y, 100.0, 21.0)];
    self.label.text = coord;
    y = y + 25.0;
    self.textfield = [[UITextField alloc]initWithFrame:CGRectMake(x,y,163,31)];
    self.textfield.borderStyle = UITextBorderStyleRoundedRect;
    [self.view addSubview:self.label];
    [self.view addSubview:self.textfield];

}

**编辑

每次添加图钉时，我还想创建一个标签（用于坐标）和一个文本字段以添加城市或其他内容。就像图片上的一样。但是当 createTextfieldForPin 在该函数中时，我只能调用一次 handleLongPressGesture ..我不知道为什么

在此处输入图像描述

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