iOS学习-UIAlertController详解

 1 //
 2 //  ViewController.m
 3 //  UIAlertController详解
 4 //
 5 //  Created by 大欢 on 16/1/25.
 6 //  Copyright © 2016年 bjsxt. All rights reserved.
 7 //
 8 
 9 #import "ViewController.h"
10 
11 @interface ViewController ()
12 
13 - (IBAction)showAlertController:(id)sender;
14 
15 @end
16 
17 @implementation ViewController
18 
19 - (void)viewDidLoad {
20     [super viewDidLoad];
21     
22 }
23 
24 - (IBAction)showAlertController:(id)sender {
25     
26     //创建UIAlertController
27     
28     UIAlertController * alertController = [UIAlertController alertControllerWithTitle:@"题目" message:@"消息" preferredStyle:UIAlertControllerStyleAlert];
29 
30     //创建按钮
31     UIAlertAction * action1 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
32         NSLog(@"no");
33     }];
34 
35     UIAlertAction * action2 = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
36         NSLog(@"ok");
37         
38         UITextField * field = alertController.textFields[0];
39         NSLog(@"%@",field.text);
40     }];
41     
42     //添加文本
43     [alertController addTextFieldWithConfigurationHandler:^(UITextField * _Nonnull textField) {
44         textField.secureTextEntry = YES;
45     }];
46     
47     [alertController addAction:action1];
48     [alertController addAction:action2];
49     
50     //展示alertController
51     [self presentViewController:alertController animated:YES completion:nil];
52     
53 }
54 
55 @end