iOS 沙盒图片的存取

简介：

图片的沙盒读存操作主要是增、删、查，一般不涉及改的操作，这里直接以代码演示

常用代码：

增

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 /**
  *  存储缩略图到沙盒中
  */
 + (BOOL)saveImageToPath:(NSString *)imageFilePath image:(UIImage *)image{
     return [UIImageJPEGRepresentation(image, 0.5) writeToFile:imageFilePath  atomically:YES];
 }

删

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 /**
  *  删除沙盒里的缩略图
  */
 + (void)deleteImageWithPath:(NSString *)thumbnailPath{
     BOOL isHave = [[NSFileManager defaultManager] fileExistsAtPath:thumbnailPath];

     if (!isHave) {
         NSLog(@"no  have");
         return ;
     }else {
         NSError *error;
         BOOL isDeleteFinish = [[NSFileManager defaultManager] removeItemAtPath:thumbnailPath error:&error];
 
         if (!isDeleteFinish) {
             NSLog(@"delete fail --- %@", error);
         }
     }
 }

查

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 UIImage *image = [UIImage imageWithContentsOfFile:thumbnailPath];

获取缩略图路径

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 /**
  *  获取缩略图的路径
  */
 + (NSString *)getFilePath{
     NSString *libPath = [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];
     NSString *thumbnailPath = [NSString stringWithFormat:@"%@/Caches/AR/ARThumbnail", libPath];
     NSFileManager *fileManager = [NSFileManager defaultManager];
     if (![fileManager fileExistsAtPath:thumbnailPath]) {
         NSError *error;
         [fileManager createDirectoryAtPath:thumbnailPath withIntermediateDirectories:YES attributes:nil error:&error];
         if (error) {
             NSLog(@"error");
             return nil;
         }
     }        
     return thumbnailPath;
 }

获取沙盒根目录

//获取沙盒根目录

NSString *directory = NSHomeDirectory();

NSLog(@"directory:%@", directory);
获取Document路径

//获取Documents路径

NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);

NSString *path = [paths objectAtIndex:0];

NSLog(@"path:%@", path);

获取Library路径

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  //获取Library路径
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
  NSString *path = [paths objectAtIndex:0];
  NSLog(@"path：%@", path);

获取tmp路径

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  NSString *tmp = NSTemporaryDirectory();
  NSLog(@"tmp：%@", tmp);

获取Caches路径

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  //获取Caches路径
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
  NSString *path = [paths objectAtIndex:0];
  NSLog(@"path：%@", path);