UI细节问题

1 iOS 导航栏导致scrollView类视图自动便宜问题

(iOS 11 导航栏 automaticallyAdjustsScrollViewInsets 无效)
需要在viewDidLoad添加一下代码

if (@available(iOS 11.0, *)) {
            self.backTableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
        } else {
            self.automaticallyAdjustsScrollViewInsets = NO;
    }

2 UITextField 快速设置边框颜色

    textField.borderStyle = UITextBorderStyleNone;
    textField.layer.borderWidth= 1.0;
    textField.layer.borderColor= [UIColor lightGrayColor].CGColor;