更改UIScrollView中每个UILabel的颜色

Question

是否可以遍历我的UIScrollview中的所有UILabel并更改颜色？

Answer 1

假设他们都子视图（第一级子）滚动视图中，而不是在它里面容器的观点...

for(UIView *subview in theScrollView.subviews) 
    if([subview isKindOfClass:[UILabel class]]) 
     [(UILabel *)subview setTextColor:[UIColor whateverColor]]; 

如果标签滚动视图内的其他意见里面，你将不得不缓存到每个子视图中，并执行相同的操作，但这是从上面简单的步骤。例如：

- (void)recolorLabelSubviews:(UIView *)view 
{ 
    for(UIView *subview in view.subviews) 
    { 
     if([subview isKindOfClass:[UILabel class]]) 
      [(UILabel *)subview setTextColor:[UIColor whateverColor]]; 
     else 
      [self recolorLabelSubviews:subview]; 
     // this doesn't handle the case where you have a label as a subview of a label 
     // if for some reason you're doing that, just move the [self recolorEtc:] call out of the "else" block 
    } 
} 

// then, wherever you want to recolor every label in the scroll view... 

[self recolorLabelSubviews:theScrollView]; 

Answer 2

尝试

for (UILabel *lbl in [self.view subviews]) { 
    if([lbl isKindOfClass:[UILabel class]]) 
    { 
     lbl.backgroundColor=[UIColor yellowColor]; 
    } 
}