续传

来源：互联网发布：win10telnet端口23失败编辑：程序博客网时间：2024/06/06 07:42

1.设置请求头文件

// 取出文件操作对象

self.handle = [NSFileHandle fileHandleForWritingAtPath:_D_Path(self.tempPath)];

// 移动到文件结尾

unsigned long long length = [self.handle seekToEndOfFile];

NSString *urlStrEncoding = [self.URL stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSURL *url = [NSURL URLWithString:urlStrEncoding];

NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:

1.0f];

// 设置请求头文件

NSString *rangeValue = [NSString stringWithFormat:@"bytes=%llu-", length];

[request addValue:rangeValue forHTTPHeaderField:@"Range"];

NSURLConnection *connection = [[NSURLConnection alloc] initWithRequest:request delegate:self startImmediately:YES];

2.数据下载之后保存

// 保存数据

[self.handle writeData:self.data];

感觉比较简单，源代码就不贴完了

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