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