iOS8 UIAlertContorller 的使用代码-优快云博客

本文链接：https://blog.youkuaiyun.com/liufuyuhao/article/details/44662645

本文介绍如何在 iOS 应用中使用 UIAlertController 来创建带有输入框和不同样式的按钮的对话框。通过 Objective-C 代码实现了一个包含取消和确定按钮的示例，并演示了如何设置输入框及处理用户输入。

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<span style="font-size:18px;">#import "TRViewController.h"

@interface TRViewController ()

@end

@implementation TRViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
}
- (IBAction)creatAlertView:(id)sender {
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"title" message:@"message here.." preferredStyle:UIAlertControllerStyleAlert];
    //将框中显示的按钮独立成了UIAlertAction类型
    UIAlertAction *cancleAction = [UIAlertAction actionWithTitle:@"Cancel" style:UIAlertActionStyleCancel handler:^(UIAlertAction *action) {
        NSLog(@"点击了取消按钮");
    }];
    UIAlertAction *otherAction  = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
        UITextField *input =(UITextField *)alert.textFields[0];
        NSLog(@"%@",input.text);
    }];
    //将创建的两个按钮添加到警告框中
    [alert addAction:cancleAction];
    [alert addAction:otherAction];
    //添加输入框
    [alert addTextFieldWithConfigurationHandler:^(UITextField *textField) {
        textField.placeholder = @"xxxx";
        textField.secureTextEntry = YES;
    }  ];  //显示警告框
    [self presentViewController:alert animated:YES completion:nil];
}
</span>