iphone - 如何以编程方式将退出按钮添加到 UIView

Question

当我在我的 super View 中创建一个 UIView 时，我想向该 View 添加一个按钮作为退出按钮。 所以当按下时，它会从我的 super View 中删除这个 UIView，我应该怎么做？ 该 View 中的 View 和按钮是在按下按钮时以编程方式创建的

- (IBAction)skillButtonPressed:(UIButton *)sender 
{
    UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(40, 130, 240, 232)];
    UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [cancelButton setFrame:CGRectMake(0, 0, 32, 32)];
    [cancelButton setTitle:@"x" forState:UIControlStateNormal];

    [myView addSubview:cancelButton];
    [self.view addSubview:myView];
}

Answer 1

在创建 View 的类中，添加如下函数:

//tag for subview - make it unique
#define SUBVIEW_TAG 9999 

- (void) handleExit
{
    UIView * subview = [self.view viewWithTag:SUBVIEW_TAG];
    [subview removeFromSuperview];
}

创建 subview 时:

- (IBAction)skillButtonPressed:(UIButton *)sender 
{
    UIView *myView = [[UIView alloc] initWithFrame:CGRectMake(40, 130, 240, 232)];
    UIButton *cancelButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    [cancelButton addTarget:self action:@selector(handleExit) forControlEvents:UIControlEventTouchUpInside];
    [cancelButton setFrame:CGRectMake(0, 0, 32, 32)];
    [cancelButton setTitle:@"x" forState:UIControlStateNormal];

    [myView addSubview:cancelButton];
    [myView setTag:SUBVIEW_TAG];
    [self.view addSubview:myView];

    //don't forget to release if you are not using ARC!
}