Page pf Simple loging_in

// //  ViewController.h //  One // //  Created by DGSCDI on 15/10/10. //  Copyright © 2015年 com.tianyi. All rights reserved. //   #import <UIKit/UIKit.h>   @interface ViewController : UIViewController   @property (weak, nonatomic) IBOutlet UITextField *nameField;   @property (weak, nonatomic) IBOutlet UITextField *passField;   - (IBAction)buttonPressed:(id)sender;     @end

2. [代码]ViewController.m     

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#import "ViewController.h"   @interface     ViewController ()   @end   @implementation     ViewController   - (     void     )viewDidLoad {          [     super     viewDidLoad];          // Do any additional setup after loading the view, typically from a nib. }   - (     void     )didReceiveMemoryWarning {          [     super     didReceiveMemoryWarning];          // Dispose of any resources that can be recreated. } -(     void     )touchesEnded:(     NSSet     <     UITouch     *> *)touches withEvent:(     UIEvent     *)event{          //回收键盘          [     self     .view endEditing:     YES     ]; } - (     IBAction     )buttonPressed:(     id     )sender {          NSLog     (@     "123"     );          //重点：便利构造器初始化方法（+类方法）          NSString     *message  =     nil     ;            //1.得到用户名和密码          NSString     *name =     self     .nameField.text;          NSString     *pass =     self     .passField.text;          //2.判断用户名和密码是否正确          if     ([name isEqual:@     ""     ]&[pass isEqual:@     ""     ]) {                        message  = @     "登陆成功"     ;          }          else     {                        message = @     "用户名或密码错误，登录失败"     ;          }          //3.配置对话框 包括确定按钮 事件通知 成功、失败                //a.对话框主体          UIAlertController     *alert = [     UIAlertController     alertControllerWithTitle: @     "温馨提示"     message:message preferredStyle:     UIAlertControllerStyleAlert     ];          //b.对话框下边确定按钮 参数1 按钮标题 参数2 按钮样式          UIAlertAction     *sureAction = [     UIAlertAction     actionWithTitle:@     "确定"     style:     UIAlertActionStyleDefault     handler:     nil     ];          //c.把按钮添加到弹出框中          [alert addAction:sureAction];          //d.弹出对话框          [     self     presentViewController:alert animated:     YES     completion:     nil     ];          }   @end

转载于:https://my.oschina.net/u/2435028/blog/549037