Swift 从 OBJC 转换

Question

我根据本指南构建相机应用程序：https://developer.dji.com/mobile-sdk/documentation/ios-tutorials/index.html 并在 swift 中写下所有内容。有人可以帮助将其转换为 swift 吗？

-(void)videoFeed:(DJIVideoFeed *)videoFeed didUpdateVideoData:(NSData *)videoData {
    [[DJIVideoPreviewer instance] push:(uint8_t *)videoData.bytes length:(int)videoData.length];
}

当我像这样将其转换为 swift 时 :

func videoFeed(_ videoFeed: DJIVideoFeed, didUpdateVideoData videoData: Data) {
        DJIVideoPreviewer.instance().push(UInt8(videoData?.bytes ?? 0), length: (videoData?.count ?? 0))
    }

我遇到错误：

无法将类型 'UInt8' 的值转换为预期的参数类型 'UnsafeMutablePointer?' 无法将类型 'UnsafeRawPointer' 的值转换为预期的参数类型 'Int?'

请帮忙。

Answer 1

您可以使用官方代码示例GitHub

Right here

    func videoFeed(_ videoFeed: DJIVideoFeed, didUpdateVideoData videoData: Data) {
        guard videoFeed == feed else {
            NSLog("ERROR: Wrong video feed update is received!");
            return
        }
        videoData.withUnsafeBytes { (ptr: UnsafePointer<UInt8>) in
            let p = UnsafeMutablePointer<UInt8>.init(mutating: ptr)
            previewer?.push(p, length: Int32(videoData.count))
            
        }
    }

下次删帖前尽量搜索好一点

Swift 从 OBJC 转换

Swift convert from OBJC

ios

swift

dji-sdk