如何在 UISlider 中对齐图像？

Question

我更改了图片的 UISlider 按钮的滑动。问题是那个地方不对，我该如何解决？

link img -> http://i.imgur.com/5L5IsB6.png

- (void)viewDidLoad {
    [super viewDidLoad];
    NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
    zoomValue = [[defaults objectForKey:@"music.zoom.value"] floatValue];
    self.slider.value = zoomValue;

    [self.slider setThumbImage:[UIImage imageNamed:@"btn-tamanho-fonte"] forState:UIControlStateNormal];

}

Answer 1

继承 UISlider 并覆盖 thumbRectForBounds:trackRect:value:.