自定义垂直 UISlider 的问题

发布于 2024-11-30 08:02:08 字数 759 浏览 1 评论 0原文

我正在尝试实现没有拇指的垂直滑块，它会对轨道上的触摸做出反应。我对 UISlider 进行了子类化，水平滑块中的一切都很好，但是当我将滑块转换为垂直时，坐标会出现奇怪的情况。可能还有其他方法来实现这个吗？请给我正确的方向，谢谢！

我现在使用此代码作为滑块：

@implementation MMTouchSlider

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchLocation = [touch locationInView:self];

    self.value = self.minimumValue + (self.maximumValue - self.minimumValue) * (touchLocation.x / self.frame.size.width);

    [super touchesBegan:touches withEvent:event];
}

- (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value {

    CGRect thumbRect = [super thumbRectForBounds:bounds trackRect:rect value:value];
    return thumbRect;
}

@end

原文

I'm trying to implement vertical slider with no thumb, that reacts to touches on it's track. I have subclassed UISlider and everything goes fine in horizontal slider, but when I'm transforming slider to vertical there is wierd stuff with coordinates going on. May be there is other way to implement this? Please, give me right direction, thanks!

I'm using this code for slider now:

@implementation MMTouchSlider

-(void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {

    UITouch *touch = [[event allTouches] anyObject];
    CGPoint touchLocation = [touch locationInView:self];

    self.value = self.minimumValue + (self.maximumValue - self.minimumValue) * (touchLocation.x / self.frame.size.width);

    [super touchesBegan:touches withEvent:event];
}

- (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value {

    CGRect thumbRect = [super thumbRectForBounds:bounds trackRect:rect value:value];
    return thumbRect;
}

@end

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花辞树 2024-12-07 08:02:08

制作垂直滑块很容易 - 只需使用 270 度旋转即可！

UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(100, 100, 200, 10)];
float angleInDegrees = 270;
float angleInRadians = angleInDegrees * (M_PI/180);
slider.transform = CGAffineTransformMakeRotation(angleInRadians);
[self.view addSubView:slider];

It's easy to make a vertical slider - just use 270 degree rotation!

UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(100, 100, 200, 10)];
float angleInDegrees = 270;
float angleInRadians = angleInDegrees * (M_PI/180);
slider.transform = CGAffineTransformMakeRotation(angleInRadians);
[self.view addSubView:slider];

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