如何在UIAlertController中添加textField？
如何在UIAlertController中添加textField？
提问于 2015-12-29 12:13:44
我想实现一个更改密码的功能。它要求用户在警告对话框中输入他们以前的密码。
我想点击“确认修改”按钮，然后跳转到另一个视图控制器更改密码。我已经写了一些代码，但我不知道下一步该怎么写。
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"Change password" message:@"Please input your previous password" preferredStyle:UIAlertControllerStyleAlert];
[alertController addTextFieldWithConfigurationHandler:^(UITextField *textField) {
textField.placeholder = @"please input your previous password";
textField.secureTextEntry = YES;
}];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@"cancel" style:UIAlertActionStyleCancel handlers:nil];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"Confirm the modification" style:UIAlertActionStyleDestructive handler:*(UIAlertAction *alertAction) {
if (condition) {
statements
}
}];
[alertController addAction:cancelAction];
[alertController addAction:okAction];
[self presentViewController:alertController animated:YES completion:nil];
回答 3
Stack Overflow用户
回答已采纳
发布于 2015-12-29 12:19:25
您可以向警报控制器添加多个文本字段，并使用警报控制器的textFields属性访问它们
如果新密码为空字符串，则再次显示警报。或者另一种方法是禁用“确认”按钮，仅当文本字段包含文本时才启用该按钮。
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"confirm the modification" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
UITextField *password = alertController.textFields.firstObject;
if (![password.text isEqualToString:@""]) {
//change password
}
else{
[self presentViewController:alertController animated:YES completion:nil];
}
}];Stack Overflow用户
发布于 2017-12-28 08:54:12
以下是创建所需类型的文本字段的Swift 4.0的更新答案：
// Create a standard UIAlertController
let alertController = UIAlertController(title: "Password Entry", message: "", preferredStyle: .alert)
// Add a textField to your controller, with a placeholder value & secure entry enabled
alertController.addTextField { textField in
textField.placeholder = "Enter password"
textField.isSecureTextEntry = true
textField.textAlignment = .center
}
// A cancel action
let cancelAction = UIAlertAction(title: "Cancel", style: .cancel) { _ in
print("Canelled")
}
// This action handles your confirmation action
let confirmAction = UIAlertAction(title: "OK", style: .default) { _ in
print("Current password value: \(alertController.textFields?.first?.text ?? "None")")
}
// Add the actions, the order here does not matter
alertController.addAction(cancelAction)
alertController.addAction(confirmAction)
// Present to user
present(alertController, animated: true, completion: nil)以及它第一次呈现时的外观：
在接受文本的同时：
Stack Overflow用户
发布于 2021-08-18 18:29:20
Swift 5.1
@objc func promptAddDialog() {
let ac = UIAlertController.init(title: "Enter answer", message: nil, preferredStyle: .alert)
ac.addTextField{ textField in
textField.placeholder = "Answer"
textField.textAlignment = .center
}
let submitAction = UIAlertAction(title: "Submit", style: .default) {
[weak self, weak ac] _ in
guard let answer = ac?.textFields?[0].text else { return }
self?.submit(answer)
}
ac.addAction(submitAction)
present(ac, animated: true)
}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/34504317
复制相关文章
相似问题
腾讯云开发者
