Question

如何使用模式对话框使用WebKit的WebView？

[_webView setMainFrameURL:[NSString fromStdString:url]];
[_nsWindow makeKeyAndOrderFront:nil];
return [NSApp runModalForWindow:_nsWindow];

前面的代码仅适用于Mac OS 10.6。使用10.5，这不会导航到指定的URL。没有runModalForWindow，一切正常。

Answer 1

WebView仅适用于主循环，因此在这种情况下不合作。一种解决方案是自己运行模态会话并手动保持主循环（类似于建议的here）。 E.g：

NSModalSession session = [NSApp beginModalSessionForWindow:yourWindow];
int result = NSRunContinuesResponse;

// Loop until some result other than continues:
while (result == NSRunContinuesResponse)
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    // Run the window modally until there are no events to process:
    result = [NSApp runModalSession:session];

    // Give the main loop some time:
    [[NSRunLoop currentRunLoop] limitDateForMode:NSDefaultRunLoopMode];

    // Drain pool to avoid memory getting clogged:
    [pool drain];
}

[NSApp endModalSession:session];

请注意，您可能希望使用类似-runMode:beforeDate:的内容来降低CPU负载。

Answer 2

我一直在寻找解决方案，现在我可以使用以下代码在模态会话中使用WebView。不使用-runMode:beforeDate我的WebView无法处理键盘或挂载事件：

- (void) OpenURL:(const char *)_url
{
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

    [NSApplication sharedApplication];
    [NSApp setDelegate:self];

    NSString *url = [NSString stringWithUTF8String:_url];

    NSLog(@"OpenURL: %@", url);

    NSRect windowRect = NSMakeRect(10.0f, 10.0f, 800.0f, 600.0f);

    NSWindow *window = [[NSWindow alloc] initWithContentRect:windowRect 
        styleMask:(NSResizableWindowMask|NSClosableWindowMask|NSTitledWindowMask) 
        backing:NSBackingStoreBuffered defer:NO];
    [window setDelegate:self];

    WebView *webview = [[WebView alloc] initWithFrame:windowRect 
        frameName:@"mainFrame" 
        groupName:nil];
    [webview setFrameLoadDelegate:self];
    [[webview mainFrame] 
          loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:url]]];

    [window setContentView:webview];
    [window makeKeyAndOrderFront:nil];

    // Modal Session

    NSModalSession session = [NSApp beginModalSessionForWindow:window];
    _result = NSModalResponseContinue;

    while (_result == NSModalResponseContinue) {
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];

        _result = [NSApp runModalSession:session];

        // The event loop is a runloop data source, so any ui event will 
        // wake up the source and make this method returns, and so 
        // you can block the run loop and tell him to wait that
        // something append. [2]
        [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode
                                    beforeDate:[NSDate distantFuture]];

        [self doSomeWork];

        [pool drain];
    }
    [NSApp endModalSession:session];

    [pool release];
}

您需要在这样的地方致电[NSApp stopModal]，[NSApp abortModal]或[NSApp stopModalWithCode:yourReturnCode]：

- (void)windowWillClose:(NSNotification *)notification
{
    NSLog(@"windowWillClose");
    [NSApp stopModal];
}

链接：

在模态NSWindowow中使用WebView无法正常工作？

2 个答案: