Question

这是代码的一部分，用于在相册中显示系统它在ios6中运行良好。不是ios7。

 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"GridCell";

    UITableViewCell *cell = [_tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (!cell) {
        cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
        CGRect frame = [AGImagePickerController itemRect];
        CGFloat leftMargin = frame.origin.x;
        for (AGIPCGridItem *gridItem in [self itemsForRowAtIndexPath:indexPath])
        {
            [gridItem setFrame:frame];
            UITapGestureRecognizer *selectionGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:gridItem action:@selector(tap)];
            selectionGestureRecognizer.numberOfTapsRequired = 1;
            [gridItem addGestureRecognizer:selectionGestureRecognizer];
            [selectionGestureRecognizer release];
            [cell addSubview:gridItem];

            frame.origin.x = frame.origin.x + frame.size.width + leftMargin;
        }
    }
    return cell;
}

AGImagePickerController的链接 https://github.com/arturgrigor/AGImagePickerController

请帮帮我！非常感谢！

Answer 1

我通过文件AGIPCAssetsController.m

中的代码得到了一个解决方案

- (void)loadAssets{

[self.assets removeAllObjects];

__block AGIPCAssetsController *blockSelf = self;
#if __IPHONE_OS_VERSION_MAX_ALLOWED < 70000
    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_LOW, 0), ^{
#endif
    @autoreleasepool {
        [blockSelf.assetsGroup enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) {
            if (result == nil) 
            {
                return;
            }
            AGIPCGridItem *gridItem = [[AGIPCGridItem alloc] initWithAsset:result andDelegate:blockSelf];
            if ( blockSelf.imagePickerController.selection != nil && 
                [blockSelf.imagePickerController.selection containsObject:result])
            {
                gridItem.selected = YES;
            }
            [blockSelf.assets addObject:gridItem];
            [gridItem release];
        }];
    }

    dispatch_async(dispatch_get_main_queue(), ^{

        [blockSelf reloadData];

    });
#if __IPHONE_OS_VERSION_MAX_ALLOWED < 70000
 });
#endif

}

我不确定这种治疗方法是否有问题？但是，我在ios6和ios7中都测试了这段代码并计算了ipad2中dispatch_async方法的成本时间，大约500张照片使用了0.4秒..所以我认为摆脱这个dispatch_aysnc没有太大的影响！

希望有用，祝福！

ios7使用AGImagePickerController来显示相册但几十秒后的照片显示

1 个答案: