在iOS 8上写入/读取具有交错双点的路径失败 [英] Writing/reading to paths with interleaved double dots fails on iOS 8

问题描述

此代码在iOS 8上失败，但它可以在iOS 7上运行

This code fails on iOS 8, although it would work on iOS 7

UIImage *imageTest = ...

NSString *file = @"../Documents/Test.png";
NSString *fullpath = [[[NSBundle mainBundle] bundlePath] stringByAppendingPathComponent: file];

[UIImagePNGRepresentation(imageTest) writeToFile: fullpath atomically: YES];

UIImage *image = [UIImage imageNamed: file];

在iOS 8上我需要使用它

On iOS 8 I need to use this instead

NSString *file = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) objectAtIndex:0] stringByAppendingPathComponent:@"Test.png"];

[UIImagePNGRepresentation(imageTest) writeToFile:file atomically:YES];

UIImage *image = [[UIImage alloc] initWithContentsOfFile: file];

...但是我必须重构我的项目以及与路径相关的第三方库到主捆绑。

...but then I have to refactor my project and a third party library that works with paths relative to the main bundle.

在我看来像/ PathToMainBundle / MyApp.app /../ Documents / something这样的路径未正确解析，或iOS 8完全不允许

It seems to me that paths like "/PathToMainBundle/MyApp.app/../Documents/something" are either not properly resolved, or not allowed at all by iOS 8

该路径应与相同/ PathToMainBundle / Documents / something

推荐答案

在iOS8中，资源目录（App.app），数据目录（NSCachesDirectory，NSTemporaryDirectory，..）分别管理如下。

In iOS8, Resource Directory(App.app), Data Directory(NSCachesDirectory, NSTemporaryDirectory,..) are managed separately as below.

• iOS7目录层次结构
  
  
  
  • App UUID
    
    
    
    • 文件
    
    
    • 图书馆
      
      
      
      • 缓存
      
      
      • 偏好设置
      
      
      
      
      • 资源目录UUID
        
        
        
        • App.app
        
        
        
        
        • 文件
        
        
        • 图书馆
          
          
          
          • 缓存
          
          
          • 偏好设置
          
          

          因此，您应该根据iOS8中的绝对路径修复代码。

          So, you should fix code based on absolute path in iOS8.

          UIImage *imageTest = ...
          
          NSString *fullpath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject] stringByAppendingPathComponent:@"Test.png"];
          
          [UIImagePNGRepresentation(imageTest) writeToFile: fullpath atomically: YES];
          
          UIImage *image = [UIImage imageNamed: fullpath];
          

          这篇关于在iOS 8上写入/读取具有交错双点的路径失败的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！