本文将带你了解IOS开发入门下载文件（代码实例），希望本文对大家学IOS有所帮助。

iOS开发之下载文件（代码实例）

- (void)downloadFile{

    NSString *urlStr = @"XXX.mp3";

    urlStr = [urlStr   stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSURL *url = [NSURL   URLWithString:urlStr];

    NSMutableURLRequest *request =   [NSMutableURLRequest requestWithURL:url];

    NSURLSession *session = [NSURLSession   sharedSession];

    NSURLSessionDownloadTask *downloadTask =   [session downloadTaskWithRequest:request completionHandler:^(NSURL *   _Nullablelocation, NSURLResponse * _Nullableresponse, NSError *   _Nullableerror) {

        if(!error) {

            NSError   *saveError;

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

            NSString *savePath = [cachePath   stringByAppendingPathComponent:@"ceshi.mp3"];

            NSURL *saveUrl = [NSURL   fileURLWithPath:savePath];

            //把下载的内容从cache复制到document下

            [[NSFileManager defaultManager]   copyItemAtURL:location toURL:saveUrl   error:&saveError];

            if(!saveError) {

                NSLog(@"save success");

            }else{

                NSLog(@"save error:%@",saveError.localizedDescription);

            }

        }else{

            NSLog(@"download error:%@",error.localizedDescription);

        }

    }];

    [downloadTask   resume];

}

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本文将带你了解IOS开发入门下载文件（代码实例），希望本文对大家学IOS有所帮助。

iOS开发之下载文件（代码实例）

- (void)downloadFile{

    NSString *urlStr = @"XXX.mp3";

    urlStr = [urlStr   stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

    NSURL *url = [NSURL   URLWithString:urlStr];

    NSMutableURLRequest *request =   [NSMutableURLRequest requestWithURL:url];

    NSURLSession *session = [NSURLSession   sharedSession];

    NSURLSessionDownloadTask *downloadTask =   [session downloadTaskWithRequest:request completionHandler:^(NSURL *   _Nullablelocation, NSURLResponse * _Nullableresponse, NSError *   _Nullableerror) {

        if(!error) {

            NSError   *saveError;

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

            NSString *savePath = [cachePath   stringByAppendingPathComponent:@"ceshi.mp3"];

            NSURL *saveUrl = [NSURL   fileURLWithPath:savePath];

            //把下载的内容从cache复制到document下

            [[NSFileManager defaultManager]   copyItemAtURL:location toURL:saveUrl   error:&saveError];

            if(!saveError) {

                NSLog(@"save success");

            }else{

                NSLog(@"save error:%@",saveError.localizedDescription);

            }

        }else{

            NSLog(@"download error:%@",error.localizedDescription);

        }

    }];

    [downloadTask   resume];

}

本文由职坐标整理并发布，希望对同学们有所帮助。了解更多详情请关注职坐标移动开发之IOS频道！