iOS11 适配

参考：http://kisscu.com/2018/07/01/%E9%80%82%E9%85%8Dios-11%E6%80%BB%E7%BB%93/

• self.navigationItem.rightBarButtonItem = leftItem;

 

if (@available(iOS 11, *)) {
        [leftItem.customView.heightAnchor constraintEqualToConstant:30].active = YES;
        [leftItem.customView.widthAnchor constraintEqualToConstant:30].active = YES;
    }

　　

• viewcontroller frame 约束

- (void)viewWillLayoutSubviews {
    [super viewWillLayoutSubviews];
    [_moduleView.tableView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.edges.equalTo(self.view);
        if (@available(iOS 11.0, *)) {
            make.bottom.equalTo(self.view.mas_safeAreaLayoutGuideBottom);
        }
        IQLog(@"make:%@", make.size);
    }];
}