Question

我已经将UIScrollView子类化，并以下列方式覆盖touchesShouldCancelInContentView：方法：

-(BOOL)touchesShouldCancelInContentView:(UIView *)view

{
    if ([view isKindOfClass:[UIButton class]] || [view isKindOfClass:[UISegmentedControl class]]) {
        return YES;
    }

    if ([view isKindOfClass:[UIControl class]]) {
        return NO;
    }

    return YES;
}

它适用于UIButton，但它对UISegmentedControl不起作用。任何帮助将不胜感激

Answer 1

终于明白了。必须继承UISegmentedControl和UIScrollView。

1。）为UISegmentedControl添加了一个新属性：

@property (nonatomic, assign) BOOL touchProcessed;

2。）重载了UISegmentedControl的以下方法：

-(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：

-(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;
             }
        }
    }
}

完美无缺！

uiscrollview不会取消uisegmentedcontrol的内容触摸

1 个答案: