1.获取Caches 文件夹路径。
NSString *pathDocuments = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSLog: /Users/sundongri/Library/Developer/CoreSimulator/Devices/649D1D25-FA3F-4EB2-96FC-92AF6A6B9D97/data/Containers/Data/Application/5668FC61-F42D-4C07-9761-24577C5327CE/Library/Caches
2.在Caches 文件夹下面 建一个子文件夹便于管理！
NSString *imagePath = [NSString stringWithFormat:@"%@/Media", pathDocuments];
[[NSFileManager defaultManager] createDirectoryAtPath:imagePath withIntermediateDirectories:YES attributes:nil error:nil];
NSLog: /Users/sundongri/Library/Developer/CoreSimulator/Devices/649D1D25-FA3F-4EB2-96FC-92AF6A6B9D97/data/Containers/Data/Application/5668FC61-F42D-4C07-9761-24577C5327CE/Library/Caches/Media
文件名字为Media。
3.获取NSData
//工程里的视频
NSString * path = [[NSBundle mainBundle] pathForResource:@"D0024" ofType:@"mp4"];
//转化成NSData
NSData *videoMy=[NSData dataWithContentsOfFile:path];
//初始化一个动态的data 容器
NSMutableData *videoData =[NSMutableData data];
//初始化要用这种 不要用videoData=nil;
[videoData setData:[NSData data]];
//添加Data 也可以用来接收下载过来的Data，因为下载的数据是一段一段过来的 所以appendData 不断的加（本地的数据就一次行加进来了）
[videoData appendData:videoMy];
//imagePath 是咱们创建的media文件夹拼上DJI_0024.mp4 ，最后结尾为media/DJI_0024.mp4
NSString *filePath = [imagePath stringByAppendingPathComponent:@"DJI_0024.mp4"];
//接下来就是写进文件 然后播放本地文件
BOOL isSuccess = [videoData writeToFile:filePath atomically:YES];
if (isSuccess) {
NSLog(@"能写进去");
}
else{
NSLog(@"不成功");
}
NSURL *url = [NSURL fileURLWithPath:filePath];
AVPlayerViewController * play = [[AVPlayerViewController alloc]init];
play.player = [[AVPlayer alloc]initWithURL:url];
[self presentViewController:play animated:YES completion:nil];
