Iphone xcode：如何在某些视图之外禁用手势识别器？

我有一个用于uiimageView的一键式手势识别器，使用户可以在该uiimageView上录制的任何位置点击并添加uiTextField

问题是，有时我会将文本字段从uiimageview中删除（靠近）。我希望文本字段不会超出uiimageview框架

以下是我在ViewDidLoad中的代码：

// Create gesture recognizer
recognizer = 
[[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(addText:)] autorelease];

// Set required taps and number of touches
[recognizer setNumberOfTapsRequired:1];
[recognizer setNumberOfTouchesRequired:1];

// Add the gesture to the view
[self.img addGestureRecognizer:recognizer];

在方法addText中：

CGPoint point = [recognizer locationInView:[self view]];

UITextField * textFld = [[UITextField alloc]init];

[textFld setDelegate:self];

[textFld addTarget:self action:@selector(imageMoved:withEvent:) forControlEvents:UIControlEventTouchDragInside];

[textFld setFont:[UIFont fontWithName:@"System Bold" size:fontSize]];

CGRect frame ;    
frame.origin.x = point.x;
frame.origin.y = point.y; 
frame.size.width=300;
frame.size.height=80;

textFld.frame=frame;

[self.img addSubview:textFld];

[textFld release];

最后是imageMoved:withEvent:

- (IBAction) imageMoved:(id)sender withEvent:(UIEvent *) event
{
CGPoint point = [[[event allTouches] anyObject] locationInView:self.view];
UIControl *control = sender;
control.center = point;

}

---

您可以使用

UIGestureRecognitizerDelegate

中的

GestureRecognitizer:shouldReceiveTouch:

方法查看触摸发生的位置，并决定是否要响应手势。如果触摸太靠近UIImageView的边缘，则返回

NO

，否则返回

YES

。或者只需检查

touch.view

，查看触摸是否发生在

UIImageView

上

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer 
       shouldReceiveTouch:(UITouch *)touch;