UIScrollView滾動條顏色？

Question

我有一個UIScrollView，我正在應用黑色背景，它在滾動條中混合。我一直在尋找一種方法將滾動條顏色更改爲白色，但我無法弄清楚。有沒有適當的方法來做到這一點？

Answer 1

您可以使用 「indicatorStyle」 屬性：

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

Answer 2

兩個UIScrollView的指標是UIScrollView的子視圖。那麼，我們可以通過 訪問UIScrollView的子視圖並更改子視圖的屬性。

1。新增UIScrollViewDelegate

@interface ViewController : UIViewController<UIScrollViewDelegate> 
@end 

2.添加scrollViewDidScroll在實現部分

-(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： - 由於這些指標更新，每次當您滾動 （意味着重置爲默認值）。所以，我們把這段代碼放在scrollViewDidScroll 的委託方法中。

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() 
    }