AFNetworking大文件下载

#import "AFNetworking.h"

//创建会话管理者

AFHTTPSessionManager * manager = [AFHTTPSessionManager manager];

/*下载文件

参数1:请求对象

参数2:进度

参数3:回调位置

targetPath:临时文件路径

response;响应头信息

参数4:completionHandler:完成回调

filePath:文件路径*/

NSURL *url = [NSURL URLWithString:@"www.baidu.com/大文件.mp4"];

NSURLRequest *request = [NSURLRequest requestWithURL:url];

NSURLSessionDownloadTask *download = [manager downloadTaskWithRequest:request progress:^(NSProgress * _Nonnull downloadProgress) {

//监听下载进度

NSLog(@"%f",1.0 *downloadProgress.completedUnitCount/downloadProgress.totalUnitCount);

} destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {

NSString *fullPath = [[NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES)lastObject]stringByAppendingPathComponent:response.suggestedFilename];

NSLog(@"targetPath:%@",targetPath);//打印下载临时路径

NSLog(@"fullPath:%@",fullPath);//打印指定下载路径

return [NSURL fileURLWithPath:fullPath];

} completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nullable filePath, NSError * _Nullable error) {

NSLog(@"filePath:%@",filePath);//打印下载完成文件路径

}];

//执行task

[download resume];