ios - 如何在 UITable 中获取 UIButton 或 UILabel 的位置？

Question

我在所有 UICellViews 中都有按钮.按下这些按钮时，会触发一些操作。到目前为止，一切都很好。

如何获取这些按钮之一相对于屏幕上可见区域的位置？您对如何实现这一目标有任何想法(或教程)吗？

Answer 1

您可以使用方法 -convertRect:toView: 的 UIView .

CGRect frameInWindow = [button convertRect:button.bounds toView:viewController.view];

这是一个小测试:

- (void)loadView
{
    [super loadView];

    self.view = [[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame];

    UIView *parentView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 300, 300)];
    [self.view addSubview:parentView];

    UIView *childView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
    [parentView addSubview:childView];

    CGRect rect1 = [childView convertRect:childView.bounds toView:self.view];
    // 200, 200, 100, 100 => correct

    // Other tests for the discussion of @H2CO3's answer.

    CGRect rect2 = [childView.superview convertRect:childView.frame toView:self.view];
    // 200, 200, 100, 100 => correct
    CGRect rect3 = [childView convertRect:childView.frame toView:self.view];
    // 300, 300, 100, 100 => wrong
}