系統的方法 只有幾種顏色

typedef NS_ENUM(NSInteger, UIScrollViewIndicatorStyle) {
    UIScrollViewIndicatorStyleDefault,     // black with white border. good against any background
    UIScrollViewIndicatorStyleBlack,       // black only. smaller. good against a white background
    UIScrollViewIndicatorStyleWhite        // white only. smaller. good against a black background
};
 

使用方法如下 

  self.tableView.indicatorStyle=UIScrollViewIndicatorStyleWhite;

當需要自定義顏色的時候需要遍歷view 對子view的UIImageView進行設定

看reveal看出  

在UITableViewController .m

- (void)viewDidLayoutSubviews
{
 
    //設定滾動條的顏色
    for (UIView* subview in [self.view subviews])
    {
        if([subview isKindOfClass:[UIImageView class]])
        {
            UIImageView *img=(UIImageView*)subview;
            img.image=[UIImage imageNamed:@"huadongtiao"];
        }
   }
   [super viewDidLayoutSubviews];
    
}