问题描述
我已经继承了 UIScrollView 并通过以下方式覆盖了 touchesShouldCancelInContentView: 方法:
I've subclassed th UIScrollView and overriden the touchesShouldCancelInContentView: method the following way:
-(BOOL)touchesShouldCancelInContentView:(UIView *)view { if ([view isKindOfClass:[UIButton class]] || [view isKindOfClass:[UISegmentedControl class]]) { return YES; } if ([view isKindOfClass:[UIControl class]]) { return NO; } return YES; }
它非常适用于 UIButton,但不适用于 UISegmentedControl.任何帮助将不胜感激
It works perfectly for UIButton, but it doesn't work for UISegmentedControl. Any help would be appreciated
推荐答案
终于想通了.必须继承 UISegmentedControl 和 UIScrollView.
Finally figured it out. Had to subclass both UISegmentedControl and UIScrollView.
1.) 为 UISegmentedControl 添加了一个新属性:
1.) added a new property for UISegmentedControl:
@property (nonatomic, assign) BOOL touchProcessed;
2.) 重载了 UISegmentedControl 的以下方法:
2.) overloaded the following methods of the UISegmentedControl:
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { if (touchProcessed) { [super touchesBegan:touches withEvent:event]; } else { [self.nextResponder touchesBegan:touches withEvent:event]; } self.touchProcessed = NO; } -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event { [self.nextResponder touchesMoved:touches withEvent:event]; } -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { [self.nextResponder touchesEnded:touches withEvent:event]; }
3.) 重载了 UIScrollview 的以下方法:
3.) overloaded the following methods of th UIScrollview:
-(BOOL)touchesShouldCancelInContentView:(UIView *)view { if ([view isKindOfClass:[self class]]) { return YES; //if there are two nested custom scrollviews } if ([view isKindOfClass:[UIButton class]] || [view isKindOfClass:[CustomSegmentedControl class]] || [[view superview] isKindOfClass:[CustomSegmentedControl class]]) { return YES; } if ([view isKindOfClass:[UIControl class]]) { return NO; } return YES; } -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { if (!self.dragging) { for (UIView *sv in self.subviews) { if ([sv isKindOfClass:[CustomSegmentedControl class]]) { //if there is more than one add a tag or tomething [(CustomSegmentedControl *)sv setTouchProcessed:YES]; [sv touchesBegan:touches withEvent:event]; return; } } } }
完美运行!