iOS:在 UIWebView 的顶部显示模态视图

Question

是否可以在 UIWebView 的顶部显示模态视图？我有一个加载 WebView 的 UIViewController。然后我想将模态视图 Controller 推到顶部，以便模态视图暂时覆盖 WebView...

WebView 工作正常；这是它在 View Controller 中的加载方式:

- (void)loadView {

    // Initialize webview and add as a subview to LandscapeController's view
    myWebView = [[[UIWebView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]] autorelease];
    myWebView.scalesPageToFit = YES;
    myWebView.autoresizesSubviews = YES;
    myWebView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);  
    myWebView.delegate = self;
    self.view = myWebView; 
}

但是，如果我尝试从 viewDidLoad 中加载模态视图 Controller ，则不会出现模态视图:

- (void)viewDidLoad {

    [super viewDidLoad];

    // Edit dcftable.html with updated figures
    NSMutableString *updated_html = [self _updateHTML:@"dcftable"];

    // Load altered HTML file as an NSURL request
    [self.myWebView loadHTMLString:updated_html baseURL:nil];

    // If user hasn't paid for dcftable, then invoke the covering modal view
    if (some_condition) {

        LandscapeCoverController *landscapeCoverController = [[[LandscapeCoverController alloc] init] autorelease ];
        [self presentModalViewController:landscapeCoverController animated:YES];    
    }   


}

我怀疑需要对 UIWebView 委托(delegate)做一些事情才能让它接收新的模态视图......但是在任何地方都找不到任何讨论或例子......再次强调，目标是调用覆盖 WebView 顶部的模态视图。

提前感谢您的任何想法!

Answer 1

我遇到了同样的问题。将 presentModalViewController 调用从 viewDidLoad 移动到 viewDidAppear 就可以了。