IOS下载文件

      -(NSString*)DownloadTextFile:(NSString*)fileUrl   fileName:(NSString*)_fileName
      {
          NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,  NSUserDomainMask,YES);//使用C函数NSSearchPathForDirectoriesInDomains来获得沙盒中目录的全路径。
          NSString *ourDocumentPath =[documentPaths objectAtIndex:0];
          NSString *sandboxPath = NSHomeDirectory();
          NSString *documentPath = [sandboxPath  stringByAppendingPathComponent:@"Documents"];//将Documents添加到sandbox路径上
          NSString *FileName=[documentPath stringByAppendingPathComponent:_fileName];//fileName就是保存文件的文件名
          NSFileManager *fileManager = [NSFileManager defaultManager];
         // Copy the database sql file from the resourcepath to the documentpath
         if ([fileManager fileExistsAtPath:FileName])
          {
             return FileName;
          }else
          {
              NSURL *url = [NSURL URLWithString:fileUrl];
             NSLog(fileUrl);
              NSData *data = [NSData dataWithContentsOfURL:url];
              [data writeToFile:FileName atomically:YES];//将NSData类型对象data写入文件，文件名为FileName
          }
         return FileName;
      }
  
 

  
 
 

文章来源: zzzili.blog.csdn.net，作者：清雨小竹，版权归原作者所有，如需转载，请联系作者。

原文链接：zzzili.blog.csdn.net/article/details/9011599