ios – 如何以编程方式从编程方式显示一个popop,也是以编程方式创建的(不使用界面构建器)

我有一个按钮,我在视图控制器中以编程方式创建.按下按钮后,我希望使用方法以编程方式创建弹出窗口.

在我的视图controller.m中的ViewDidLoad中创建的按钮

 UIView *moreFundInfoView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 540, 620)];
[self.view addSubview:moreFundInfoView];
[moreFundInfoView setBackgroundColor:[UIColor RMBColor:@"b"]];

btnContact = [UIButton buttonWithType:(UIButtonTypeRoundedRect)];


[btnContact setFrame:CGRectMake(390, 575, contactButton.width, contactButton.height)];
 btnContact.hidden = NO;
[btnContact setTitle:@"Contact" forState:(UIControlStateNormal)];
[moreFundInfoView addSubview:btnContact];

[btnContact addTarget:self action:@selector(showContactDetails:) forControlEvents:UIControlEventTouchUpInside];

然后按下按钮,我使用了我使用的方法.

-(void) showContactDetails: (id) sender
{
UIViewController *popoverContent = [[UIViewController alloc]init];

UIView *popoverView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 200, 300)];

[popoverView setBackgroundColor:[UIColor RMBColor:@"b"]];

popoverContent.view = popoverView;

popoverContent.contentSizeForViewInPopover = CGSizeMake(200, 300);

UIPopoverController *contactPopover =[[UIPopoverController alloc] initWithContentViewController:popoverContent];

[contactPopover presentPopoverFromRect:btnContact.frame inView:self.view permittedArrowDirections:UIPopoverArrowDirectionUp animated:YES ];

[contactPopover setDelegate:self];

}

我在这里缺少什么?因为它运行正常,但一旦我点击按钮,应用程序崩溃.我认为这是一个委托问题,但我不确定.任何建议将不胜感激.

最佳答案
我认为这个代码将会帮助你.你肯定缺少委托方法

ViewController *viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:viewController];
UIPopoverController *popover = [[UIPopoverController alloc] initWithContentViewController:navigationController];
popover.delegate = self;
popover.popoverContentSize = CGSizeMake(644, 425); //your custom size.
[popover presentPopoverFromRect:button.frame inView:self.view permittedArrowDirections: UIPopoverArrowDirectionLeft | UIPopoverArrowDirectionUp animated:YES];

只要确保你不会忘记UIPopover Delegate方法,否则应用程序肯定会崩溃.这是强制性的

转载注明原文:ios – 如何以编程方式从编程方式显示一个popop,也是以编程方式创建的(不使用界面构建器) - 代码日志