一.

1.导入制作二维码的第三方libqrencode

2.在viewController中导入头文件

#import "QRCodeGenerator.h"

3.在xib中拖入控件并关联

4. 在制作二维码按钮

self.IMG.image = [QRCodeGenerator qrImageForString:self.contentTF.text imageSize:self.IMG.frame.size.width];

//保存二维码并给与二维码图片名称

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

    [UIImagePNGRepresentation(self.IMG.image) writeToFile:qq atomically:YES];

5.在显示按钮中跳转

[self.navigationController pushViewController:[oneViewController new] animated:YES];

二.

1.在第二个界面创建xib并拖入控件并关联

2.在第二个界面中实现

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

    self.IMG1.image  = [UIImage imageWithContentsOfFile:qq]

3.添加系统方法

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
    [self.navigationController popViewControllerAnimated:YES];
}

三.

1.导入友盟推送SDK

2.添加依赖库

CoreTelephony.framework

libz.tbd

libsqlite3.tbd

SystemConfiguration.framework

3.在AppDelegate.m导入头文件

#import <UMPush/UMessage.h>

4.Push组件基本功能配置

    UMessageRegisterEntity * entity = [[UMessageRegisterEntity alloc] init];

    //type是对推送的几个参数的选择，可以选择一个或者多个。默认是三个全部打开，即：声音，弹窗，角标

    entity.types = UMessageAuthorizationOptionBadge|UMessageAuthorizationOptionSound|UMessageAuthorizationOptionAlert;

    [UNUserNotificationCenter currentNotificationCenter].delegate=self;

    [UMessage registerForRemoteNotificationsWithLaunchOptions:launchOptions Entity:entity    completionHandler:^(BOOL granted, NSError * _Nullable error) {

        if (granted) {

            UIAlertView *alertV = [[UIAlertView alloc]initWithTitle:@"推送" message:@"推送授权成功" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

            [alertV show];

        }else{

            UIAlertView *alertV = [[UIAlertView alloc]initWithTitle:@"推送" message:@"推送授权失败" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"确定", nil];

            [alertV show];

        }

    }];