根据url地址下载文件到本地，返回本地文件地址

      -(NSString*)DownloadTextFile:(NSString*)fileUrl   fileName:(NSString*)_fileName
      {
          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];
         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;
      }
  
 

  
 
 

/打开本地文件，获取文件路径

       NSString *FileName = @"myWebURL.plist";
          NSArray *cachePath= NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
          NSString *cacheDir = [cachePath objectAtIndex:0];
          NSString *FilePath = [cacheDir stringByAppendingPathComponent:FileName];
          NSFileManager *fileManager = [NSFileManager defaultManager];
         // Copy the file from the resourcepath to the documentpath
         if (![fileManager fileExistsAtPath:FilePath])
          {
              NSString *filePathFromApp = [[[NSBundle mainBundle] resourcePath] stringByAppendingPathComponent:FileName];
              NSError *error;
              [fileManager copyItemAtPath:filePathFromApp toPath:FilePath error:&error];
          }
         NSLog(FilePath);
  
 

  
 
 

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/8844413