Question

当我第一次点击它显示自定义左栏按钮时，我遇到了自定义LeftBarButtonItem的问题，但在第二次它被隐藏了！这个问题只出现在ios 11中，但是在ios10中它运行得很好。

Class A:
- (void)setBackButton {
    if (_backTabBarItem == nil) {
        UIButton *backButton     = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 30, 30)];
        [backButton setImage:[UIImage  imageNamed:@"icon_back"] forState:UIControlStateNormal];
        [backButton setTitleColor:[UIColor white] forState:UIControlStateNormal];
        [backButton addTarget:self action:@selector(popViewController) forControlEvents:UIControlEventTouchUpInside];
        self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:backButton];
    }
    [self.navigationItem setLeftBarButtonItem:_backTabBarItem animated:NO];
}

B级

：

func showLisHikeViewController(actionView: ActionView) {
        let listHikeController = EMListHikeViewController.sharedManager() as! EMListHikeViewController

        let leftButton = UIBarButtonItem(image: UIImage(named:"ic_slide"),style : .plain, target: self, action: #selector(EMSlideMenu.leftButtonAction)) //Use a selector
        listHikeController.backTabBarItem = leftButton
.....
}

请帮助

自定义leftbarbuttonItem未在ios 11中显示

0 个答案: