在 iOS 9 中不鼓励在分离的视图控制器上显示视图控制器？

Posted 2023-03-12

【中文标题】在 iOS 9 中不鼓励在分离的视图控制器上显示视图控制器？

【英文标题】：Presenting view controllers on detached view controllers is discouraged in iOS 9?

【发布时间】：2016-04-20 07:23:10

【问题描述】：

在我的应用程序中，当我从 tableview 页脚部分移动到另一个视图控制器时，它运行良好，但移动应用程序后会崩溃。之后我收到此错误。

这是我的代码：

-(UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section

    if(tableView == educateTbl) //here you can make a decision
    
        float footerWidth = 150.0f;
        float padding = 10.0f;
        UIView *footerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, footerWidth, 50.0)];
        footerView.autoresizingMask = UIViewAutoresizingFlexibleWidth;

        UIButton *addEdu = [[UIButton alloc]initWithFrame:CGRectMake(padding, 0, footerWidth - 2.0f * padding, 44.0f)];
        addEdu.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin;
        addEdu.contentHorizontalAlignment = UIControlContentHorizontalAlignmentCenter;

        addEdu.backgroundColor = [UIColor colorWithRed:23/255.0 green:186/255.0 blue:239/255.0 alpha:1.0];
        [addEdu setTitle:@"Add Education" forState:UIControlStateNormal];
        [addEdu addTarget:self action:@selector(addEducation:) forControlEvents:UIControlEventTouchUpInside];
        [addEdu setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];//set the color this is may be different for ios 7
        addEdu.frame=CGRectMake(0, 0, 200, 30); //set some large width to ur title
        [footerView addSubview:addEdu];
        return footerView;
    
    return nil;


- (void)addEducation:(id)sender

    UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];
    AddEducationViewController *ivc = [storyboard instantiateViewControllerWithIdentifier:@"AddEducationVC"];
    [self presentViewController:ivc animated:YES completion:nil];

【问题讨论】：

发布错误，即将发生什么错误

你必须用强指针保持ivc。

@AayushKatiyar。查看我更新的问题。

你在 addEducationViewController.h 和 .m 文件中写了什么

Warning :-Presenting view controllers on detached view controllers is discouraged的可能重复

【参考方案1】：

[self presentViewController:ivc animated:YES completion:nil];

尝试改变：

[self.view.window.rootViewController presentViewController:deleAlert animated:YES completion:nil];