Question

这是我正在使用的代码：

UIButton *mainButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[mainButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
mainButton.center = CGPointMake(self.view.frame.size.width/2.0f, self.view.frame.size.height/2.0f);
[self.view addSubview:mainButton];

UIView *subView = [[UIView alloc] initWithFrame:CGRectMake(0, 100, 200, 100)];
[subView setBackgroundColor:[UIColor purpleColor]];
[mainButton addSubview:subView];

UIButton *secondButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[secondButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
secondButton.center = CGPointMake(subView.frame.size.width/2.0f, subView.frame.size.height/2.0f);
[subView addSubview:secondButton];

为什么mainButton可以点击但是secondButton不是？

Answer 1

K你应该在self.view上添加子视图。

UIView *subView = [[UIView alloc] initWithFrame:CGRectMake(0, 100, 200, 100)];
[subView setBackgroundColor:[UIColor purpleColor]];
[self.view addSubview:subView];

UIButton *secondButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[secondButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
secondButton.center = CGPointMake(subView.frame.size.width/2.0f, subView.frame.size.height/2.0f);
[subView addSubview:secondButton];
UIButton *thirdButton = [[UIButton alloc] initWithFrame:CGRectMake(100, 0, 100, 100)];
[secondButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
secondButton.center = CGPointMake(subView.frame.size.width/2.0f, subView.frame.size.height/2.0f);
[subView addSubview:secondButton];

试试这个。它会在子视图上添加两个按钮。

Answer 2

你不应该在UIButton

中添加UIView作为子视图

尝试这个

UIView *subView = [[UIView alloc] initWithFrame:CGRectMake(0, 100, 200, 100)];
[subView setBackgroundColor:[UIColor purpleColor]];
[self.view addSubview:subView];

UIButton *mainButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[mainButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
mainButton.center = CGPointMake(self.view.frame.size.width/2.0f, self.view.frame.size.height/2.0f);
[subView addSubview:mainButton];

UIButton *secondButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 100, 100, 100)];
[secondButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
[subView addSubview:secondButton];

编辑：如果你想将两个按钮保持在不同的视图上，那么请选择两个子视图并尝试.....

UIView *subView1 = [[UIView alloc] initWithFrame:CGRectMake(0, 100, 100, 100)];
[subView1 setBackgroundColor:[UIColor purpleColor]];
[self.view addSubview:subView1];

UIButton *mainButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[mainButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
[subView1 addSubview:mainButton];


UIView *subView2 = [[UIView alloc] initWithFrame:CGRectMake(0, 200, 100, 100)];
[subView2 setBackgroundColor:[UIColor purpleColor]];
[self.view addSubview:subView2];


UIButton *secondButton = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];
[secondButton setImage:[UIImage imageNamed:@"CircleShape.png"] forState:UIControlStateNormal];
[subView2 addSubview:secondButton];

Answer 3

问题是你的subView是mainButton的子节点。您应该将其添加到viewController的视图中。

UIButton的子视图不可点击

3 个答案: