导入生成二维码的第三方。 libqrencode

//导入生成二维码的头文件

 #import "QRCodeGenerator.h"

//导入自己创建的继承于ViewController试图控制器

#import "OneViewController.h"

@interface ViewController ()

{

   UIImageView *imgV;

    UITextField *text;

}

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.navigationItem.title = @"二维码";

    UIBarButtonItem*right = [[UIBarButtonItemalloc]initWithTitle:@"查看二维码"style:UIBarButtonItemStyleDonetarget:selfaction:@selector(tiaoZhaun)];

    self.navigationItem.rightBarButtonItem = right;

    imgV = [[UIImageView alloc]initWithFrame:CGRectMake(100, 250, 200, 200)];

    imgV.backgroundColor = [UIColor redColor];

    [self.view addSubview:imgV];

    // 设置按钮

    UIButton *btn = [[UIButton alloc]initWithFrame:CGRectMake(100, 100, 100, 40)];

    // 设置背景颜色

    btn.backgroundColor = [UIColor greenColor];

    // 设置文字

    [btnsetTitle:@"生成二维码" forState:UIControlStateNormal];

    // 设置文字颜色

    [btnsetTitleColor:[UIColor blackColor] forState:UIControlStateNormal];

    // 点击事件

    [btnaddTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];

    // 添加到主界面

    [self.viewaddSubview:btn];

}

// 跳转到下一个界面

- (void)tiaoZhaun{

    [self presentViewController:[OneViewController new] animated:YES completion:nil];

}

// 点击事件

- (void)click{

   // 创建提示框

    UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"创建二维码" message:@"" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

    [alertsetAlertViewStyle:UIAlertViewStylePlainTextInput];

    UITextField*textF = [alerttextFieldAtIndex:0];

    textF.placeholder=@"请输入字符串";

    [alertshow];

}

- (void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

    if(buttonIndex ==1) {

        text= [alertViewtextFieldAtIndex:0];

    }

    // 生成二维码

    UIImage *image = [QRCodeGenerator qrImageForString:text.text imageSize:imgV.frame.size.width];

    imgV.image= image;

    //保存二维码并给与二维码图片名称

    NSString *filePath = [NSString stringWithFormat:@"%@/123.png",NSHomeDirectory()];

    [UIImagePNGRepresentation(imgV.image) writeToFile:filePath atomically:YES];

}

//注册通知，点击点击进行通知的时候调用

-(void)touchesBegan:(NSSet*)touches withEvent:(UIEvent*)event{

    UIApplication *application =[UIApplication sharedApplication];

    //如果当前应用程序没有注册本地通知，需要注册

    if([application currentUserNotificationSettings].types==UIUserNotificationTypeNone){

        UIUserNotificationSettings *setting=[UIUserNotificationSettings settingsForTypes:UIUserNotificationTypeBadge|UIUserNotificationTypeSound|UIUserNotificationTypeAlert categories:nil];       [applicationregisterUserNotificationSettings:setting];

   }

   //删除之前的重复通知

    [applicationcancelAllLocalNotifications];

    //添加本地通知

    NSDate * date=[NSDate dateWithTimeIntervalSinceNow:10];

    [self LocalNotificationSleep :date];

}

#pragma mark - 添加本地通知

- (void) LocalNotificationSleep:(NSDate*) date{

    UILocalNotification * noti=[[UILocalNotification alloc] init];

    //设置开始时间

    noti.fireDate=date;

    //设置body

    noti.alertBody=@"你有一条消息提醒，请查收！";

    //设置action

    noti.alertAction=@"详情";

    //设置闹铃

    noti.soundName=@"4195.mp3";

#warning 注册完之后如果不删除，下次会继续存在，即使从模拟器卸载掉也会保留

    //注册通知

    [[UIApplication sharedApplication] scheduleLocalNotification:noti];

}