//  ViewController.h
//  qq登入器
//
//  
Created by pg on 14-5-17.
//  
Copyright (c) 2014年 mqd. All rights reserved.
#import 
<UIKit/UIKit.h>
@interface 
ViewController : UIViewController <UITextFieldDelegate>
//定义输入账号
@property 
(weak, nonatomic) IBOutlet UITextField *inNum;
//定义输入密码
@property (weak, nonatomic) IBOutlet UITextField 
*inCode;
//定义按钮
- 
(IBAction)button:(UIButton *)sender;
//定义消息输出框
@property (weak, nonatomic) IBOutlet UILabel 
*outmessage;
@end
//  ViewController.m
//  qq登入器
//
//  
Created by pg on 14-5-17.
//  
Copyright (c) 2014年 mqd. All rights reserved.
#import 
"ViewController.h"
@interface 
ViewController ()
@end
@implementation ViewController
#pragma mark - button方法
- 
(IBAction)button:(UIButton *)sender {
    //创建输入账号对象
    
NSString *num = [_inNum text];
    //创建输入密码对象
    
NSString *code = [_inCode text];
    //创建并格式化消息对象
    
NSString *messages = [NSString 
stringWithFormat:@"消息:\n账号:%@\n密码:%@",num,code];
    
//调用uitextField的text方法实现数据传输
    [_outmessage 
setText:messages];
   
 
    
//自动隐藏键盘
    [self.view 
endEditing:YES];
   
 
}
//设置textField的回传代理
#pragma mark - 代理方法
-(BOOL)textFieldShouldReturn:(UITextField 
*)textField{
    
//用户光标在上一输入框内,接受到enter则调用次方法传递响应者令牌
    if (textField == _inNum) 
{
        [_inCode 
becomeFirstResponder];
    }else if(textField == 
_inCode){
        
//调用button方法实现数据处理,nil无需返回值
        [self 
button:nil];
      }
    
return YES;
}
@end
原文地址:http://www.cnblogs.com/modingding/p/3734477.html