iphone - 删除 NSDocumentDirectory 中的项目

Question

我正在使用 HSImageSidebarView，当点击图像时，如果您想删除它，将弹出一个 AlertView。 这是它删除侧边栏中显示的图像的方式:

-(void)sidebar:(HSImageSidebarView *)sidebar didTapImageAtIndex:(NSUInteger)anIndex {
    NSLog(@"Touched image at index: %u", anIndex);
    if (sidebar.selectedIndex == anIndex) {
        UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:@"Delete image?"
                                                           delegate:self
                                                  cancelButtonTitle:@"Cancel"
                                             destructiveButtonTitle:@"Delete" otherButtonTitles:nil];

        self.actionSheetBlock = ^(NSUInteger selectedIndex) {
            if (selectedIndex == sheet.destructiveButtonIndex) {
                [sidebar deleteRowAtIndex:anIndex];
                self.actionSheetBlock = nil;
            }
        };

        [sheet showFromRect:[sidebar frameOfImageAtIndex:anIndex]
                     inView:sidebar
                   animated:YES];

    }
}
- (void)sidebar:(HSImageSidebarView *)sidebar didRemoveImageAtIndex:(NSUInteger)anIndex {
    NSLog(@"Image at index %d removed", anIndex);
    [images removeObjectAtIndex:anIndex];
}

顺便说一句，我的图片来自NSDocumentDirectory，但我想添加的是当点击侧边栏中的图片时，它还会删除NSDocumentDirectory 中的图片。

我知道这是如何删除 NSDocumentDirectory 中的图像，但我不知道如何在上面的代码中使用它。

- (void)removeImage:(NSString*)fileName {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", fileName]];
    [fileManager removeItemAtPath: fullPath error:NULL];
    NSLog(@"image removed");
}

Answer 1

我希望这可以解决它:

 - (void)sidebar:(HSImageSidebarView *)sidebar didRemoveImageAtIndex:(NSUInteger)anIndex {
    NSLog(@"Image at index %d removed", anIndex);


//remove the image from Document dir
[self removeImage:[images objectAtIndex:anIndex]];

//then remove the image from the Array.
[images removeObjectAtIndex:anIndex];


}

- (void)removeImage:(NSString*)fileName {
    NSFileManager *fileManager = [NSFileManager defaultManager];
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDirectory = [paths objectAtIndex:0];
    NSString *fullPath = [documentsDirectory stringByAppendingPathComponent:[NSString stringWithFormat:@"%@.png", fileName]];
    [fileManager removeItemAtPath: fullPath error:NULL];
    NSLog(@"image removed");
}