iOS 沙盒图片的存取

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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：

1. 增

    /***  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];}
   

2. 删

    /***  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);}}}
   

3. 查

    UIImage *image = [UIImage imageWithContentsOfFile:thumbnailPath];
   

4. 获取缩略图路径

    /***  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;}
   

5. 获取沙盒根目录
   //获取沙盒根目录
   NSString *directory = NSHomeDirectory();
   NSLog(@“directory:%@”, directory);

6. 获取Document路径
   //获取Documents路径
   NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
   NSString *path = [paths objectAtIndex:0];
   NSLog(@“path:%@”, path);

7. 获取Library路径

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

8. 获取tmp路径

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

9. 获取Caches路径

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

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