无法获取UIView的子视图

Question

我在vwProgress2中添加了3个图像视图，分别带有标记100,101,102。但是，当我打印其子视图时，我得到0计数..

NSLog(@"%d",[[vwProgress2 subviews]count]);

    for (UIView *subView in vwProgress2.subviews) {
        if ([subView isKindOfClass:[UIImageView class]] && subView.tag >= 100) {
            [(UIImageView *)subView setImage:nil];
            NSLog(@"Hello");
        }
    }

可能是什么原因？我已经设置了IBOutlet。

Answer 1

使用viewWithTag：方法从标签获取图像视图，尝试此代码，

UIImageView *queProgress = (UIImageView *)[self. vwProgress2 viewWithTag: 100];
UIImageView *queTrue = (UIImageView *)[self. vwProgress2 viewWithTag: 101];
UIImageView *queFalse = (UIImageView *)[self. vwProgress2 viewWithTag: 102];

谢谢

Answer 2

UIImageView *queProgress = (UIImageView *)[self.view viewWithTag: 100];
UIImageView *queTrue = (UIImageView *)[self.view viewWithTag: 101];
UIImageView *queFalse = (UIImageView *)[self.view viewWithTag: 102];