UIAlertController不是窗口层次结构
UIAlertController不是窗口层次结构
提问于 2016-05-04 07:51:57
我试图显示一个包含UIPickerView和UITextField的弹出。
下面是我用来创建弹出的代码。
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];它工作fine.However，如果我试图通过点击输入UITextField中的文本，键盘就不会出现，因此Im无法在UITextField中键入任何内容。我怎么才能解决这个问题？
回答 2
Stack Overflow用户
回答已采纳
发布于 2016-05-04 08:35:21
原因是您添加了
textField、button和所有这些工具视图，但是toolview高度非常低。
将toolView高度从44更改为500或其他( textfield，按钮+50的组合)。更改以下报表
UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270.0f, 44.f)]; 至
UIView *toolView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 270.0f, 500.f)];更新
更改这一行
[self presentViewController:alert animated:YES completion:nil];转到
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];更新新
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 })Stack Overflow用户
发布于 2016-05-04 11:24:04
试试这个也许能帮到你：-
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];页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/37021648
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