如何阻止 MPMoviePlayerController 显示“无法播放此电影。”？

发布于 2024-09-12 18:45:29 字数 157 浏览 4 评论 0原文

我使用 MPMoviePlayerController 在 iPhone 上播放一些视频和音频流。

有时某些 Steam 不可用，因此在 iPhone OS 3.1 上，即使我收到了所有通知，我也会收到 4 条“此电影无法播放”警报。

谁能告诉我如何防止这种情况发生？

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忘东忘西忘不掉你 2024-09-19 18:45:29

为了防止 MPMoviePlayerController 显示 UIAlertView 警报，您可以使用以下方法：

将以下方法添加到您的应用程序委托中，并确保调用 patchMPVVC 仅在启动时一次：

#import "/usr/include/objc/objc-runtime.h"

- (void)_handleError:(NSNotification *)notification {
    // do nothing, or add any custom error handling code here
}

- (void)patchMPVVC {
    // add the _handleError: method to the MPVideoViewController class
    Class class = NSClassFromString(@"MPVideoViewController");
    Method myMethod = class_getInstanceMethod([self class], @selector(_handleError:));
    class_addMethod(class, @selector(_handleError:), method_getImplementation(myMethod), "v@:@");

    // swap method implementations:
    SEL selector = sel_registerName("_videoView_playbackErrorNotification");
    Method originalMethod = class_getInstanceMethod(class, selector);       
    myMethod = class_getInstanceMethod(class, @selector(_handleError:));
    method_exchangeImplementations(originalMethod, myMethod);
}

请记住，此代码可能会被苹果拒绝，因为它引用了私有 MPVideoViewController 类和 _videoView_playbackErrorNotification 方法。

in order to prevent the MPMoviePlayerController from displaying UIAlertView alerts, you can use the following approach:

add the following methods to your application delegate, and make sure to call patchMPVVC only once on startup:

#import "/usr/include/objc/objc-runtime.h"

- (void)_handleError:(NSNotification *)notification {
    // do nothing, or add any custom error handling code here
}

- (void)patchMPVVC {
    // add the _handleError: method to the MPVideoViewController class
    Class class = NSClassFromString(@"MPVideoViewController");
    Method myMethod = class_getInstanceMethod([self class], @selector(_handleError:));
    class_addMethod(class, @selector(_handleError:), method_getImplementation(myMethod), "v@:@");

    // swap method implementations:
    SEL selector = sel_registerName("_videoView_playbackErrorNotification");
    Method originalMethod = class_getInstanceMethod(class, selector);       
    myMethod = class_getInstanceMethod(class, @selector(_handleError:));
    method_exchangeImplementations(originalMethod, myMethod);
}

just keep in mind that this code might be rejected by apple due to the fact that it references the private MPVideoViewController class and _videoView_playbackErrorNotification method.

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