IOS下载资源zip到本地然后读取

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思路是

1.ios下载服务器上的zip资源包（图片，声音等经过zip压缩的资源包）到本地

2.解压zip到程序目录

3.从程序目录加载资源文件

一、下载zip资源

  

   

    

     

    
    

     

      -(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:@"TestDownImgZip.app"];//将Documents添加到sandbox路径上//TestDownImgZip.app
     
    
   

    

     

    
    

     

          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];
     
    
   

    

     

    
    

     

              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;
     
    
   

    

     

    
    

     

      }
     
    
  
 

  
 
 

2.解压zip包

  

   

    

     

    
    

     

      - (void)OpenZip:(NSString*)zipPath  unzipto:(NSString*)_unzipto
     
    
   

    

     

    
    

     

      {
     
    
   

    

     

    
    

     

          ZipArchive* zip = [[ZipArchive alloc] init];
     
    
   

    

     

    
    

     
    if( [zip UnzipOpenFile:zipPath] )
     
    
   

    

     

    
    

     

          {
     
    
   

    

     

    
    

     

              BOOL ret = [zip UnzipFileTo:_unzipto overWrite:YES];
     
    
   

    

     

    
    

     
        if( NO==ret )
     
    
   

    

     

    
    

     

              {
     
    
   

    

     

    
    

     
            NSLog(@"error");
     
    
   

    

     

    
    

     

              }
     
    
   

    

     

    
    

     

              [zip UnzipCloseFile];
     
    
   

    

     

    
    

     

          }
     
    
   

    

     

    
    

     

          [zip release];
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

      }
     
    
  
 

  
 
 

3.调去函数

  

   

    

     

    
    

     

      - (IBAction)ShowImg:(id)sender {
     
    
   

    

     

    
    

     

          NSString *filePath = [self DownloadTextFile:@"http://www.xtox.net/img.zip" fileName:@"img.zip"];
     
    
   

    

     

    
    

     
    NSLog(filePath);
     
    
   

    

     

    
    

     
    
     
    
   

    

     

    
    

     

          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:@"TestDownImgZip.app"];//将Documents添加到sandbox路径上//TestDownImgZip.app
     
    
   

    

     

    
    

     
 
     
    
   

    

     

    
    

     

          [self OpenZip:filePath unzipto:documentPath];
     
    
   

    

     

    
    

     

          self.imgView.image = [UIImage imageNamed:@"img/1.png"];
     
    
   

    

     

    
    

     

      }
     
    
  
 

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/9029025