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