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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"]; }
