我正在为iPad开发iOS6应用。我已经编写了UITextField的子类，使用户可以在视图周围拖动，收缩和旋转字段。问题在于，如果不旋转就捏住该字段，则完成手势后，它将进入编辑模式。这不应该发生，并且我添加了一些禁用它的行，但是它并没有停止。这是我的代码：
- (BOOL) canBecomeFirstResponder{
if (gesturing==YES) {
return NO;
}else return YES;
}
- (void) tapDetected:(UITapGestureRecognizer*) pinchRecognizer {
if (gesturing==NO) {
[self becomeFirstResponder];
}
}
- (void) pinchDetected:(UIPinchGestureRecognizer*) pinchRecognizer {
CGFloat scale = pinchRecognizer.scale;
self.font = [self.font fontWithSize:self.font.pointSize*(scale)];
//self.transform = CGAffineTransformScale(self.transform, scale, scale);
[self sizeToFit];
pinchRecognizer.scale = 1.0;
if (pinchRecognizer.state == UIGestureRecognizerStateChanged) {
gesturing =YES;
}
if (pinchRecognizer.state == UIGestureRecognizerStateBegan) {
gesturing =YES;
}
if (pinchRecognizer.state == UIGestureRecognizerStateEnded) {
gesturing =NO;
}
}
- (void) panDetected:(UIPanGestureRecognizer *)panRecognizer {
CGPoint translation = [panRecognizer translationInView:self.superview];
CGPoint imageViewPosition = self.center;
imageViewPosition.x += translation.x;
imageViewPosition.y += translation.y;
self.center = imageViewPosition;
[panRecognizer setTranslation:CGPointZero inView: self.superview];
if (panRecognizer.state == UIGestureRecognizerStateChanged) {
gesturing=YES;
}
if (panRecognizer.state == UIGestureRecognizerStateEnded) {
gesturing=NO;
}
}
- (void) rotationDetected:(UIRotationGestureRecognizer *)rotationRecognizer{
CGFloat angle = rotationRecognizer.rotation;
self.transform = CGAffineTransformRotate(self.transform, angle);
rotationRecognizer.rotation = 0.0;
if (rotationRecognizer.state == UIGestureRecognizerStateChanged) {
gesturing = YES;
}
if (rotationRecognizer.state == UIGestureRecognizerStateEnded) {
gesturing = NO;
}
}
- (BOOL) gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
return YES;
}
最佳答案
如果没有将其初始化为gesturing，则我默认的NO值为YES。是否调试并弄清楚了何时尝试应用pinch时首先检测到哪个手势识别器？
您支持同时手势识别，因此当您应用pinch时，手指的触摸可能会被检测为pan。如果是这种情况，则if(gesturing == NO)方法中的tapDetected:条件将得到满足，并且您的textField将成为第一响应者。