查看指定路径文件是否存在

NSString*urlStr =self.dic[@"videoUrl"];

//检查文件是否已经下载

NSString*cachesPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES)lastObject];

NSString*path = [cachesPathstringByAppendingPathComponent:self.dic[@"fileName"]];

NSURL*fileUrl = [NSURLfileURLWithPath:path];

NSFileManager*fileManager = [NSFileManagerdefaultManager];

//

if([fileManagerfileExistsAtPath:path]) {

//文件存在

[self.delegatevideoCell:selfisDownloadedWithPath:fileUrl];

return;

}