Ios UIAlertController不是窗口层次结构

我试图显示一个弹出窗口，其中包含

UIPickerView

和

UITextField

下面是我用来创建弹出窗口的代码

self.alert = [UIAlertController alertControllerWithTitle:nil message:@"\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n" preferredStyle:UIAlertControllerStyleAlert];


    CGRect pickerFrame = CGRectMake(0, 0, 270, 200);
    UIPickerView *regionsPicker = [[UIPickerView alloc] initWithFrame:pickerFrame];
    regionsPicker.tag = 1;
    regionsPicker.dataSource = (id <UIPickerViewDataSource>)self;
    regionsPicker.delegate = (id <UIPickerViewDelegate>) self;
    [regionsPicker setShowsSelectionIndicator:YES];

    UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270.0f, 44.f)];
    toolView.backgroundColor = [UIColor blackColor];

    CGRect buttonFrame = CGRectMake(0, 5, 100, 30);
    UIButton *button = [[UIButton alloc] initWithFrame: buttonFrame];
    button.imageEdgeInsets = UIEdgeInsetsMake(0, button.titleLabel.frame.size.width, 0, -button.titleLabel.frame.size.width);
    UIImage *btnImage = [UIImage imageNamed:@"delete.png"];
    [button setImage:btnImage forState:UIControlStateNormal];
    [button setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    [button setTitleColor: [UIColor blueColor] forState: UIControlStateNormal];
    [toolView addSubview:button];
    [button addTarget:self action:@selector(closeDialog:) forControlEvents:UIControlEventTouchUpInside];


    self.textField = [[UITextView alloc] initWithFrame:CGRectMake(30, 170, 220, 200)];
    _textField.editable = NO;
    _textField.hidden=true;
    self.textField.text = @"Enter text...";
    self.textField.font = [UIFont systemFontOfSize:15];
    self.textField.autocorrectionType = UITextAutocorrectionTypeNo;
    self.textField.keyboardType = UIKeyboardTypeDefault;
    self.textField.returnKeyType = UIReturnKeyDone;
    self.textField.textColor = [UIColor lightGrayColor];
    self.textField.delegate = (id <UITextViewDelegate>) self;
    self.textField.layer.borderWidth = 1.0f;
    self.textField.layer.cornerRadius = 5;
    self.textField.layer.borderColor = [[UIColor grayColor] CGColor];

    [toolView addSubview:self.textField];

    CGRect actionFrame = CGRectMake(80, 400, 100, 30);
    UIButton *actionBtn = [[UIButton alloc] initWithFrame: actionFrame];
    [actionBtn setTitle:@"Submit" forState:UIControlStateNormal];
    [actionBtn setTitleColor: [UIColor whiteColor] forState: UIControlStateNormal];
    [actionBtn setBackgroundColor:[UIColor purpleColor]];

    [self.textField setUserInteractionEnabled:YES];
    [toolView setUserInteractionEnabled:YES];
    [self.alert.view setUserInteractionEnabled:YES];

    [self.alert.view addSubview:regionsPicker];
    [self.alert.view addSubview:self.textField];
    [self.alert.view addSubview:toolView];
    [self.alert.view addSubview:actionBtn];
    id rootViewController=[UIApplication sharedApplication].delegate.window.rootViewController;
    if([rootViewController isKindOfClass:[UINavigationController class]])
    {
        rootViewController=[((UINavigationController *)rootViewController).viewControllers objectAtIndex:0];
    }
    [rootViewController presentViewController:_alert animated:YES completion:nil];

self.alert=[UIAlertController alertControllerWithTitle:nil消息：@“\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n“首选样式：UIAlertControllerStyleAlert]；
CGRect pickerFrame=CGRectMake（0,0270200）；
UIPickerView*RegionPicker=[[UIPickerView alloc]initWithFrame:pickerFrame]；
regionsPicker.tag=1；
regionsPicker.dataSource=（id）self；
regionsPicker.delegate=（id）self；
[区域选择器设置显示选择指示器：是]；
UIView*toolView=[[UIView alloc]initWithFrame:CGRectMake（0,0270.0f，44.f）]；
toolView.backgroundColor=[UIColor blackColor]；
CGRect buttonFrame=CGRectMake（0,5100,30）；
UIButton*button=[[UIButton alloc]initWithFrame:buttonFrame]；
button.imageEdgeInsets=UIEdgeInsetsMake（0，button.titleLabel.frame.size.width，0，-button.titleLabel.frame.size.width）；
UIImage*btnImage=[UIImage ImageName:@“delete.png”]；
[按钮设置图像：btnImage for状态：uicontrol状态正常]；
[按钮设置标题颜色：[UIColor whiteColor]用于状态：UIControlStateNormal]；
[按钮设置标题颜色：[UIColor blueColor]用于状态：uicontrol状态正常]；
[工具视图添加子视图：按钮]；
[按钮添加目标：自我操作：@selector（closeDialog:）forControlEvents:UIControlEventTouchUpInside]；
self.textField=[[UITextView alloc]initWithFrame:CGRectMake（30170220200）]；
_textField.editable=否；
_textField.hidden=true；
self.textField.text=@“输入文本…”；
self.textField.font=[UIFont systemFontOfSize:15]；
self.textField.autocorrectionType=UITextAutocorrectionTypeNo；
self.textField.keyboardType=UIKeyboardTypeDefault；
self.textField.returnKeyType=UIReturnKeyDone；
self.textField.textColor=[UIColor lightGrayColor]；
self.textField.delegate=（id）self；
self.textField.layer.borderWidth=1.0f；
self.textField.layer.cornerRadius=5；
self.textField.layer.borderColor=[[UIColor grayColor]CGColor]；
[工具视图添加子视图：self.textField]；
CGRect actionFrame=CGRectMake（8040010030）；
UIButton*actionBtn=[[UIButton alloc]initWithFrame:actionFrame]；
[actionBtn setTitle:@“提交”状态：UIControlStateNormal]；
[actionBtn setTitleColor:[UIColor whiteColor]用于状态：UIControlStateNormal]；
[actionBtn setBackgroundColor:[UIColor purpleColor]；
[self.textField setUserInteractionEnabled:是]；
[toolView setUserInteractionEnabled:是]；
[self.alert.view setUserInteractionEnabled:是]；
[self.alert.view addSubview:regionsPicker]；
[self.alert.view addSubview:self.textField]；
[self.alert.view addSubview:toolView]；
[self.alert.view addSubview:actionBtn]；
id rootViewController=[UIApplication sharedApplication].delegate.window.rootViewController；
if（[rootViewController是类的种类：[UINavigationController类]]）
{
rootViewController=[（（UINavigationController*）rootViewController.ViewController对象索引：0]；
}
[rootViewController presentViewController:_警报动画：是完成：无]；

它工作正常。但是，如果我试图通过点击在

UITextField

中输入文本，键盘不会出现，因此我无法在

UITextField

中键入任何内容。我怎样才能解决这个问题

原因是您添加了

文本字段

，

按钮

，所有这些都在工具视图中，但是

工具视图

的高度非常低

将“工具视图”高度从44更改为44 输入500或其他（文本字段的组合，按钮+50）。 更改以下声明

UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270.0f, 44.f)]; 

到

更新

换行

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

进入

更新新内容

  UIViewController *rootViewController=[UIApplication sharedApplication].delegate.window.rootViewController;
if([rootViewController isKindOfClass:[UINavigationController class]])
{
  rootViewController=[((UINavigationController *)rootViewController).viewControllers objectAtIndex:0];
}else
{
   while (rootViewController.presentedViewController) {
    rootViewController = rootViewController.presentedViewController;
}
 }
[rootViewController presentViewController:alert animated:YES completion:nil];

Swift

 var rootViewController: UIViewController = UIApplication.sharedApplication().delegate.window.rootViewController
if (rootViewController is UINavigationController.self) {
rootViewController = ((rootViewController as! UINavigationController)).viewControllers[0]
}
else {
while rootViewController.presentedViewController {
    rootViewController = rootViewController.presentedViewController
}
}
rootViewController.presentViewController(alert, animated: true, completion: { _ in })

---

试试这个，它可能会帮助你：-

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:@" Your message " preferredStyle:UIAlertControllerStyleAlert];

UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270, 200)];
toolView.backgroundColor = [UIColor blackColor];

CGRect buttonFrame = CGRectMake(0, 5, 100, 30);
UIButton *button = [[UIButton alloc] initWithFrame:buttonFrame];
[button setTitle:@"Image" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[toolView addSubview:button];

UITextField *txtField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 270, 44)];
txtField.borderStyle = UITextBorderStyleRoundedRect;
txtField.backgroundColor = [UIColor grayColor];
txtField.font = [UIFont systemFontOfSize:15];
txtField.placeholder = @"enter text";
txtField.autocorrectionType = UITextAutocorrectionTypeNo;
txtField.keyboardType = UIKeyboardTypeDefault;
txtField.returnKeyType = UIReturnKeyDone;
txtField.clearButtonMode = UITextFieldViewModeWhileEditing;
txtField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
txtField.delegate = (id<UITextFieldDelegate>)self;

[toolView addSubview:txtField];

[txtField setUserInteractionEnabled:YES];
[toolView setUserInteractionEnabled:YES];
[alertController.view setUserInteractionEnabled:YES];

[alertController.view addSubview:toolView];
[self presentViewController:alertController animated:YES completion:nil];

UIAlertController*alertController=[UIAlertController alertControllerWithTitle:nil消息：@“您的消息”首选样式：UIAlertControllerStyleAlert]；
UIView*toolView=[[UIView alloc]initWithFrame:CGRectMake（0,0,270,200）]；
toolView.backgroundColor=[UIColor blackColor]；
CGRect buttonFrame=CGRectMake（0,5100,30）；
UIButton*button=[[UIButton alloc]initWithFrame:buttonFrame]；
[按钮设置标题：@“图像”用于状态：uicontrol状态正常]；
[按钮设置标题颜色：[UIColor blueColor]用于状态：uicontrol状态正常]；
[工具视图添加子视图：按钮]；
UITextField*txtField=[[UITextField alloc]initWithFrame:CGRectMake（0,0,270,44）]；
txtField.borderStyle=UITextBorderStyleRoundedRect；
txtField.backgroundColor=[UIColor grayColor]；
txtField.font=[UIFont systemFontOfSize:15]；
txtField.placeholder=@“输入文本”；
txtField.autocorrectionType=UITextAutocorrectionTypeNo；
txtField.keyboardType=UIKeyboardTypeDefault；
txtField.returnKeyType=UIReturnKeyDone；
txtField.clearButtonMode=UITextFieldViewModeWhileEditing；
txtField.contentVerticalAlignment=uicontrol contentVerticalAlignment中心；
txtField.delegate=（id）self；
[工具视图添加子视图：txtField]；
[txtField setUserInteractionEnabled:是]；
[toolView setUserInteractionEnabled:是]；
[alertController.view setUserInteractionEnabled:是]；
[alertController.view添加子视图：工具视图]；
[self-presentViewController:alertController动画：是完成：无]；

问题：当字体大小仅为

15.0f

时，为什么您的

textField

高度为

200

？还显示要在何处实现

UITextFieldDelegate

方法的代码。我认为不应将子视图添加到

UIAlertController

中，而应使用自定义版本的“UIAlertController”相反，我是否可以通过任何方式将视图或视图控制器显示为一个弹出窗口？负面投票人可以解释向下投票的原因问题是什么，如果你需要澄清，我当然会解释，@user22312412-简单兄弟，好的，你在哪里贴了代码

 var rootViewController: UIViewController = UIApplication.sharedApplication().delegate.window.rootViewController
if (rootViewController is UINavigationController.self) {
rootViewController = ((rootViewController as! UINavigationController)).viewControllers[0]
}
else {
while rootViewController.presentedViewController {
    rootViewController = rootViewController.presentedViewController
}
}
rootViewController.presentViewController(alert, animated: true, completion: { _ in })

UIAlertController *alertController = [UIAlertController alertControllerWithTitle:nil message:@" Your message " preferredStyle:UIAlertControllerStyleAlert];

UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270, 200)];
toolView.backgroundColor = [UIColor blackColor];

CGRect buttonFrame = CGRectMake(0, 5, 100, 30);
UIButton *button = [[UIButton alloc] initWithFrame:buttonFrame];
[button setTitle:@"Image" forState:UIControlStateNormal];
[button setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];
[toolView addSubview:button];

UITextField *txtField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 270, 44)];
txtField.borderStyle = UITextBorderStyleRoundedRect;
txtField.backgroundColor = [UIColor grayColor];
txtField.font = [UIFont systemFontOfSize:15];
txtField.placeholder = @"enter text";
txtField.autocorrectionType = UITextAutocorrectionTypeNo;
txtField.keyboardType = UIKeyboardTypeDefault;
txtField.returnKeyType = UIReturnKeyDone;
txtField.clearButtonMode = UITextFieldViewModeWhileEditing;
txtField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
txtField.delegate = (id<UITextFieldDelegate>)self;

[toolView addSubview:txtField];

[txtField setUserInteractionEnabled:YES];
[toolView setUserInteractionEnabled:YES];
[alertController.view setUserInteractionEnabled:YES];

[alertController.view addSubview:toolView];
[self presentViewController:alertController animated:YES completion:nil];