#import <UIKit/UIKit.h>

@interface XYZViewController : UIViewController <UITextFieldDelegate>

@property (weak, nonatomic) IBOutlet UITextField *wenben1;

@property (weak, nonatomic) IBOutlet UITextField *wenben2;

@property (weak, nonatomic) IBOutlet UITextField *wenben3;

@property (weak, nonatomic) IBOutlet UITextField *wenben4;

@property (weak, nonatomic) IBOutlet UILabel *jieguo;

@property (weak, nonatomic) IBOutlet UILabel *shuchu;

- (IBAction)kaishi:(id)sender;
- (IBAction)framee:(UIButton *)sender;

@end



#import "XYZViewController.h"

@interface XYZViewController ()

@end

@implementation XYZViewController


-(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    if (textField==_wenben1) {
        [_wenben2 becomeFirstResponder];
    }else if(textField == _wenben2)
    {

        [_wenben3 becomeFirstResponder];
    }else if(textField==_wenben3)
    {

        [_wenben4 becomeFirstResponder];

    }else if(_wenben4==textField)
    {

        [self kaishi:nil];

    }


    return YES;
}

- (IBAction)kaishi:(id)sender
{
   //获取文本框内容
    NSString *text1 = self.wenben1.text;
    NSString *text2 = [self wenben2].text;
    NSString *text3 = [_wenben3 text];
    NSString *text4 = [_wenben4 text];

    //转换

    NSInteger num3 = [text3 integerValue];
    NSInteger num4 = [text4 integerValue];

    NSInteger num5 = num3 + num4;

    _shuchu.text = [NSString stringWithFormat:@"账号是：%@\n密码是：%@",text1,text2];


    //输出结果
    _jieguo.text = [NSString stringWithFormat:@"%d",num5];

    [self.view endEditing:YES];

}

- (IBAction)framee:(UIButton *)sender {


}

@end




运行结果：   _shuchu.text = [NSString stringWithFormat:@"账号是：%@\n密码是：%@",text1,text2]; 一点作用都没有，


shuchu那个lable  没反应  




而且 有时候 感觉 按钮点不动  然后把按钮放大  又点的动了  是不是黑苹果的原因啊？

额  没玩过论坛  不怎么太会

楼主发的是什么代码？怎么还有笑脸？看不懂，呵呵