ios 在 Swift 中将 void* 传递给 UISaveVideoAtPathToSavedPhotosAlbum [英] ios passing a void* into UISaveVideoAtPathToSavedPhotosAlbum in Swift

问题描述

我是 Swift 的新手.我正在尝试在我的类中使用方法签名:

I'm new to Swift. I'm trying to use the method signature in my class:

func UISaveVideoAtPathToSavedPhotosAlbum(_ videoPath: String!,
                                   _ completionTarget: AnyObject!,
                                   _ completionSelector: Selector,
                                   _ contextInfo: CMutableVoidPointer)

最后一个参数 contextInfo 是 obj-c 中的 void *.

The last argument, contextInfo, is a void * in obj-c.

如果我在 Swift 中传递字典，我会得到一个 NSDictionary 而不是 CMutableVoidPointer 错误的子类型.将不胜感激任何帮助.我不知道如何在 Swift 中传递 void * 等效参数而不会出现该错误.

I get an NSDictionary not a subtype of CMutableVoidPointer error if I pass a dictionary in Swift. Would appreciate any help with this. I don't know how to pass a void * equivalent argument in Swift without getting that error.

推荐答案

Objective C - Void*

Objective C - Void*

Swift - UnsafeMutablePointer

Swift - UnsafeMutablePointer

...示例

//将视频保存到相机胶卷的调用

// Your call to save video to camera roll

UISaveVideoAtPathToSavedPhotosAlbum(yourVideoPath, self, "video:didFinishSavingWithError:contextInfo:", nil)

//保存视频后的完成处理程序

// Your Completion Handler after video is saved

    func video(videoPath: String, didFinishSavingWithError error: NSError, contextInfo info: UnsafeMutablePointer<Void>) {
// your completion code handled here

}

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