问题描述
我从本指南构建相机应用程序:https://developer.dji.com/mobile-sdk/documentation/ios-tutorials/index.html 并迅速写出所有东西。 有人可以帮忙将其转换为快捷方式吗?
-(void)videoFeed:(DJIVideoFeed *)videoFeed didUpdateVideoData:(NSData *)videoData {
[[DJIVideoPreviewer instance] push:(uint8_t *)videoData.bytes length:(int)videoData.length];
}
当我将其转换为这样的迅捷时:
func videoFeed(_ videoFeed: DJIVideoFeed,didUpdateVideoData videoData: Data) {
DJIVideoPreviewer.instance().push(UInt8(videoData?.bytes ?? 0),length: (videoData?.count ?? 0))
}
我遇到了错误:
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?”
请帮助。
解决方法
您可以使用官方代码示例GitHub
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))
}
}
在下次删除帖子之前尝试搜索更好的内容