iOS 生成二维码并识别跳转到app store

这里我是将生成好的二维码分享到微信好友，并通过识别发送的二维码跳转到app store

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将图1的文件，导入自己的工程中。

图1 二维码文件

在VC中，引入头文件  #import "MKQRCode.h"

@interface MyViewController ()

@property(nonatomic,strong)UIImageView *imageView; //声明属性--->二维码图片

@end

- (void)viewDidLoad {

[super viewDidLoad];

//生成二维码

self.imageView = [[UIImageView alloc]init];

[self.shareView addSubview:self.imageView];

[self.imageView mas_makeConstraints:^(MASConstraintMaker *make) {

make.centerX.equalTo(self.shareView.mas_centerX);

make.top.equalTo(self.shareView.mas_top).offset(35);

make.width.mas_offset(170*ScreenWidth/375);

make.height.mas_offset(170*ScreenWidth/375);

}];

//创建过滤器

CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];

//恢复默认

[filter setDefaults];

//给过滤器添加数据

NSString *dataString = @"http://www.pa181.com/";//http://www.520it.com

NSData *data = [dataString dataUsingEncoding:NSUTF8StringEncoding];

//通过KVO设置滤镜inputMessage数据

[filter setValue:data forKey:@"inputMessage"];

//获取输出的二维码

self.outputImage = [filter outputImage];

//将CIImage转换成UIImage，并放大显示

self.imageView.image = [self generateImage];

//分享按钮

UIButton *shareBtn = [UIButton buttonWithType:UIButtonTypeSystem];

[self.shareView addSubview:shareBtn];

[shareBtn setBackgroundImage:[UIImage imageNamed:@"2017010309110575"] forState:UIControlStateNormal];

[shareBtn mas_makeConstraints:^(MASConstraintMaker *make) {

make.top.equalTo(self.imageView.mas_bottom).offset(35);

make.centerX.equalTo(self.imageView.mas_centerX);

make.width.mas_offset(172*ScreenWidth/375);

make.height.mas_offset(45*ScreenWidth/375);

}];

[shareBtn addTarget:self action:@selector(shareBtnAction) forControlEvents:UIControlEventTouchUpInside];

}

#pragma mark -------- 生成二维码方法 ----------

- (UIImage *)generateImage

{

MKQRCode *code = [[MKQRCode alloc] init];

// 内容和大小  https://github.com/ymkil/MKQRCode

//    [code setInfo:@"http://www.pa181.com" withSize:300];

[code setInfo:@"https://itunes.apple.com/cn/app/id1216226866" withSize:300];

code.centerImg = [UIImage imageNamed:@"关于丁丁_03"];

code.style = MKQRCodeStyleCenterImage;

return [code generateImage];

}

在生成二维码方法里，需要注意的是跳转到app store的地址是https://itunes.apple.com/cn/app/id1216226866，而1216226866是上传app的唯一ID。

#pragma mark ---------------------------- 分享按钮方法 --------------------------------

-(void)shareBtnAction{

NSArray *activityItems = @[self.imageView.image];

//里面initWithActivityItems  传的是item的数组  如果直接用图片数组的话 会经常出现 微信断开的错误

UIActivityViewController *activityView =[[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];

// 选中分享类型

[activityView setCompletionWithItemsHandler:^(NSString * __nullable activityType, BOOL completed, NSArray * __nullable returnedItems, NSError * __nullable activityError){

//        NSLog(@"act type %@",activityType);

if (completed) {

NSLog(@"ok");

}else {

NSLog(@"no ok");

}

}];

activityView.restorationIdentifier = @"activity";

[activityView setTitle:@"分享"];

[self presentViewController:activityView animated:TRUE completion:nil];

}