Question

我有一个UIButton子类，其中包含UITextView和两个UILabels我创建它们执行以下操作：

UILabel *authorName = [[UILabel alloc] initWithFrame: CGRectMake(0, viewHeight, viewWidth, 16)];
authorName.backgroundColor = [[UIColor blackColor] colorWithAlphaComponent:.5];
authorName.textColor = [UIColor whiteColor];
authorName.font = [UIFont systemFontOfSize:13];
authorName.text = [NSString stringWithFormat:@"@%@",[data objectForKey:@"username"]];
[self addSubview:authorName];

UILabel *likes = [[UILabel alloc] initWithFrame:CGRectMake(viewWidth-50, viewHeight-20, 50, 20)];
likes.backgroundColor = authorName.backgroundColor;
likes.textColor = authorName.textColor;
likes.textAlignment = NSTextAlignmentCenter;
likes.font = authorName.font;
likes.text = [NSString stringWithFormat:@"Likes: %@", [data objectForKey:@"likes"]];
[self addSubview:likes];

UITextView *postText = [[UITextView alloc] initWithFrame:CGRectMake(0, 0, viewWidth, viewHeight)];
postText.editable = NO;
postText.text = [NSString stringWithFormat:@"%@",[data objectForKey:@"text"]];
postText.font = [UIFont systemFontOfSize:16];
postText.backgroundColor = [[UIColor orangeColor] colorWithAlphaComponent:0.6];

问题在于最后一个 postText 使用了子类 frame 的UIButton，我想使用该按钮，将此postText添加到subviews的底部，因为如果它位于顶部，我将无法点按该按钮。

我尝试使用

[self bringSubviewToFront:self];

和

[self sendSubviewToBack:postText];

并且

[self insertSubview:postText aboveSubview:authorName];

最后

[self insertSubview:postText atIndex:0];

但是他们都没有因某种原因而工作。

Answer 1

问题的症结在于UIButton是此处的父视图，您添加的每个子视图都是在 UIView之上，即UIButton }。所以像：

[self bringSubviewToFront:self];

当然无效，因为self不是subview的{{1}}

你在这里应该做的事情不是为此继承self。您应该通过将UIButton视图放在UIView的所有其他子视图之上来制作符合您需要的自定义MyFancyButtonThing类UIButton。

Subview没有深究

1 个答案: