黑团debugLog

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  1. 08下拉菜单,xib文件名和类名必须一致!差了个s,导致显示不出来!

  2. 10.3.popover消失

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            if (self.changeCityBlock) {
                    self.changeCityBlock();
            }
            HMCitiesViewController *citiesVc = [[HMCitiesViewController alloc] init];
            citiesVc.modalPresentationStyle = UIModalPresentationFormSheet;
            [self presentViewController:citiesVc animated:YES completion:nil];}}

    Warning: Attempt to present <HMCitiesViewController: 0x7f9dd4e1d970> on <HMRegionsViewController: 0x7f9dd4c1bc30> whose view is not in the window hierarchy!

    1. 不能dismiss,只能变透明.

    2. 透明还是能看到

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      self.view.alpha = 0;

    3. 设置frame为0,导致约束冲突,也不好.

  3. 10.2.城市列表导航栏背景图片不拉伸.

    1. 给背景图片添加Constraints.

  4. 10.4.5.开始编辑导航栏上移,只有图片动.

    1. 应该选整体的约束,选了图片的约束.
    2. Snip20191125_5

  5. collectionView layout 只需要设置好insetWidth

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-(void)setupLayout:(CGFloat)totalWidth orientation:(UIInterfaceOrientation)orientatioin
{
    // 总列数
    int columns = UIInterfaceOrientationIsPortrait(orientatioin) ? 2 : 3;
    
    // FlowLayout
    UICollectionViewFlowLayout *layout = (UICollectionViewFlowLayout *)self.collectionViewLayout;
    
    CGFloat lineSpacing = 25;
    CGFloat sectionInsetWidth = (totalWidth - columns * layout.itemSize.width ) / (columns + 1);
    
    layout.minimumLineSpacing = lineSpacing;
    //不需要设置minimumInteritemSpacing
//    layout.minimumInteritemSpacing = interitemSpacing;
    
    layout.sectionInset = UIEdgeInsetsMake(lineSpacing, sectionInsetWidth, lineSpacing, sectionInsetWidth);
}

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image-20191202142030284

UM4.4.适用iOS7,高版本iOS不支持.