Question

I m customizing a UISlider. I could set a custom thumb image that is higher than the usual thumb however I could not make the track higher when setting a higher minimum track image but the track height remained the same. It should be possible as in the iPod/Music App on the iPad the volume slider is also higher as the usual slider as you can see here:

_{(source: cocoia.com)}

Answer 1

您需要将斜体分类,并超越<条形码>。

- (CGRect)trackRectForBounds:(CGRect)bounds
{
    return bounds;
}

Answer 2

快速通道最简单的解决办法:

class TBSlider: UISlider {

    override func trackRectForBounds(bounds: CGRect) -> CGRect {
        return CGRectMake(0, 0, bounds.size.width, 4)
    }
}

Answer 3

那些希望看到某些工作守则来改变轨道规模的人。

class CustomUISlider : UISlider
{        
    override func trackRectForBounds(bounds: CGRect) -> CGRect {
        //keeps original origin and width, changes height, you get the idea
        let customBounds = CGRect(origin: bounds.origin, size: CGSize(width: bounds.size.width, height: 5.0))
        super.trackRectForBounds(customBounds)
        return customBounds
    }

    //while we are here, why not change the image here as well? (bonus material)
    override func awakeFromNib() {
        self.setThumbImage(UIImage(named: "customThumb"), forState: .Normal)
        super.awakeFromNib()
    }
}

仅剩下几件事情正在改变故事片中的等级:

“story板stuff”/

如果你想把更多的风俗 custom上 add上你的话,你可以继续使用你寻求的巴.行动,并删除目标类别UISlider。

Answer 4

下面使用的方法setThumbImage, setMinimumTrackImage ,>。

[self setThumbImage:[UIImage imageNamed:@"switchThumb.png"] forState:UIControlStateNormal]; [self setMinimumTrackImage:[UIImage imageNamed:@"switchBlueBg.png"] forState:UIControlStateNormal]; [self setMaximumTrackImage:[UIImage imageNamed:@"switchOffPlain.png"] forState:UIControlStateNormal];

并设立这样的子类

- (id) initWithFrame: (CGRect)rect{ if ((self=[super initWithFrame:CGRectMake(rect.origin.x,rect.origin.y,90,27)])){ [self awakeFromNib]; } return self; }

Answer 5

//use this code

 UIImage *volumeLeftTrackImage = [[UIImage imageNamed: @"video_payer_scroll_selection.png"] stretchableImageWithLeftCapWidth: 9 topCapHeight: 0];
        UIImage *volumeRightTrackImage= [[UIImage imageNamed: @"video_bar_bg.png"] stretchableImageWithLeftCapWidth: 9 topCapHeight: 0];
        [volumeslider setMinimumTrackImage: volumeLeftTrackImage  forState: UIControlStateNormal];
        [volumeslider setMaximumTrackImage: volumeRightTrackImage  forState: UIControlStateNormal];
        [volumeslider setThumbImage:[UIImage imageNamed:@"sound_bar_btn.png"] forState:UIControlStateNormal];
        [tempview addSubview:volumeslider];

友情链接