UIScrollView滚动条颜色？

Question

我有一个UIScrollView，我正在应用黑色背景，它在滚动条中混合。我一直在寻找一种方法将滚动条颜色更改为白色，但我无法弄清楚。有没有适当的方法来做到这一点？

Answer 1

您可以使用 “indicatorStyle” 属性：

[scrollView1 setBackgroundColor:[UIColor blackColor]]; 
scrollView1.indicatorStyle = UIScrollViewIndicatorStyleWhite; 

Answer 2

两个UIScrollView的指标是UIScrollView的子视图。那么，我们可以通过 访问UIScrollView的子视图并更改子视图的属性。

1。新增UIScrollViewDelegate

@interface ViewController : UIViewController<UIScrollViewDelegate> 
@end 

2.添加scrollViewDidScroll在实现部分

-(void)scrollViewDidScroll:(UIScrollView *)scrollView1 
{ 
    //get refrence of vertical indicator 
    UIImageView *verticalIndicator = ((UIImageView *)[scrollView.subviews objectAtIndex:(scrollView.subviews.count-1)]); 
    //set color to vertical indicator 
    [verticalIndicator setBackgroundColor:[UIColor redColor]]; 


    //get refrence of horizontal indicator 
    UIImageView *horizontalIndicator = ((UIImageView *)[scrollView.subviews objectAtIndex:(scrollView.subviews.count-2)]); 
    //set color to horizontal indicator 
    [horizontalIndicator setBackgroundColor:[UIColor blueColor]]; 
} 

注： - 由于这些指标更新，每次当您滚动 （意味着重置为默认值）。所以，我们把这段代码放在scrollViewDidScroll 的委托方法中。

Answer 3

//ScrollView Deleagate 
    func scrollViewDidScroll(scrollView: UIScrollView){ 
     let verticalIndicator: UIImageView = (scrollView.subviews[(scrollView.subviews.count - 1)] as! UIImageView) 
     verticalIndicator.backgroundColor = UIColor.redColor() 


     let horizontalIndicator: UIImageView = (scrollView.subviews[(scrollView.subviews.count - 2)] as! UIImageView) 
     horizontalIndicator.backgroundColor = UIColor.blueColor() 
    }