xcode - 如何关闭以编程方式创建的 UIWebView？

Question

我有以下代码以编程方式创建 UIWebView 并在其顶部创建 UIButton 以将其关闭。创建没问题，但问题是我无法引用创建的 UIWebView 来从按钮关闭它!

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];
NSURL *url = [NSURL URLWithString:@"http://www.google.com"];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestObj];
[self.view addSubview:webView];

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self 
           action:@selector(aMethod:)
 forControlEvents:UIControlEventTouchDown];
[button setTitle:@"Close" forState:UIControlStateNormal];
button.frame = CGRectMake(80, 210, 160, 40);
[button addTarget:self action:@selector(close:) forControlEvents:UIControlEventTouchUpInside];
[webView addSubview:button];

- (IBAction)close:(id)sender {
????
}

提前感谢您的帮助:)

Answer 1

在ViewController.m中

UIWebView *webView = [[UIWebView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)];

// tag will be used to get this webview later
webView.tag=55;
NSURL *url = [NSURL URLWithString:@"http://www.google.com"];
NSURLRequest *requestObj = [NSURLRequest requestWithURL:url];
[webView loadRequest:requestObj];
[self.view addSubview:webView];

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self 
           action:@selector(close:)
 forControlEvents:UIControlEventTouchDown];
[button setTitle:@"Close" forState:UIControlStateNormal];
button.frame = CGRectMake(80, 210, 160, 40);
[button addTarget:self action:@selector(close:) forControlEvents:UIControlEventTouchUpInside];
[webView addSubview:button];





- (IBAction)close:(id)sender {

    [[self.view viewWithTag:55] removeFromSuperview];


}