objective-c - 如何更改 Apple 示例代码项目 MoviePlayer

Question

在 Apple 示例代码项目:MoviePlayer 中，我想实现的是，当示例 App 启动时，本地视频会立即以编程方式播放。

我加上最后两句:

[self.tabBarController setSelectedIndex:1];
[self performSelector:@selector(playMovieButtonPressed:) withObject:tabBarController.selectedViewController afterDelay:0.0];

在下面的函数中:

- (void)applicationDidFinishLaunching:(UIApplication *)application
{
    /* Override point for customization after app. launch. */

    /* Add the tab bar controller's current view as a subview of the window. */
    [window addSubview:tabBarController.view];
    [window makeKeyAndVisible]; 
    [self.tabBarController setSelectedIndex:1];
    [self performSelector:@selector(playMovieButtonPressed:) withObject:tabBarController.selectedViewController afterDelay:0.0];
}

但出现以下错误:

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[MyLocalMovieViewController playMovieButtonPressed]: unrecognized selector sent to instance 0x6190330'

请帮忙，谢谢!

Answer 1

您需要获取指向您的 MyLocalMovieViewController 的指针，然后执行类似

的操作

[pointer playMovieButtonPressed:nil]