#import "ViewController.h"
#import "UIImage+RoundedRectImage.h"
#import "KMQRCod.h"

@interface ViewController ()

@property (weak, nonatomic) IBOutlet UIImageView *imgVQRCode; //显示二维码部分
@property (weak, nonatomic) IBOutlet UITextField *textField; //输入内容

@property (nonatomic,retain) UIImage *saveImage; //将二维码图片接收
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
}

#pragma mark 确认按钮的点击事件
- (IBAction)confirmButtonClick:(UIButton *)sender {
    
    if (self.textField.text.length) {
        [self layoutUIWithString:self.textField.text];
    } else {
        NSLog(@"输入的内容不能为空");
    }
}

#pragma mark 保存按钮点击事件
- (IBAction)saveClick:(UIButton *)sender {
    
    if (self.saveImage) {
        UIImageWriteToSavedPhotosAlbum(self.saveImage, self, @selector(image:didFinishSavingWithError:contextInfo:), NULL);
    }
}

//指定回调方法
-(void)image:(UIImage*)image didFinishSavingWithError:(NSError*)error contextInfo:(void*)contextInfo {
    if(!error){
        NSLog(@"保存成功");
    }else{
        NSLog(@"保存失败");
    }
}

#pragma mark 生成二维码方法
/**
 导入头文件
 #import "UIImage+RoundedRectImage.h"
 #import "KMQRCod.h"
 */
- (void)layoutUIWithString:(NSString *)str {
    //用于生成二维码的字符串source
    NSString *source = str;
    
    //使用iOS 7后的CIFilter对象操作，生成二维码图片imgQRCode（会拉伸图片，比较模糊，效果不佳）
    CIImage *imgQRCode = [KMQRCod createQRCodeImage:source];
    
    //使用核心绘图框架CG（Core Graphics）对象操作，进一步针对大小生成二维码图片imgAdaptiveQRCode（图片大小适合，清晰，效果好）
    UIImage *imgAdaptiveQRCode = [KMQRCod resizeQRCodeImage:imgQRCode
                                                    withSize:_imgVQRCode.frame.size.width];
    
    //默认产生的黑白色的二维码图片；我们可以让它产生其它颜色的二维码图片，例如：蓝白色的二维码图片
    imgAdaptiveQRCode = [KMQRCod specialColorImage:imgAdaptiveQRCode
                                            withRed:33.0
                                              green:114.0
                                               blue:237.0]; //0~255
    
    //使用核心绘图框架CG（Core Graphics）对象操作，创建带圆角效果的图片
    UIImage *imgIcon = [UIImage createRoundedRectImage:[UIImage imageNamed:@"二维码"]
                                              withSize:CGSizeMake(70.0, 70.0)
                                            withRadius:10];
    //使用核心绘图框架CG（Core Graphics）对象操作，合并二维码图片和用于中间显示的图标图片
    imgAdaptiveQRCode = [KMQRCod addIconToQRCodeImage:imgAdaptiveQRCode
                                              withIcon:imgIcon
                                          withIconSize:imgIcon.size];
    
    //    imgAdaptiveQRCode = [KMQRCode addIconToQRCodeImage:imgAdaptiveQRCode
    //                                              withIcon:imgIcon
    //                                             withScale:3];
    
#pragma mark 获取保存的图片
    self.saveImage = imgAdaptiveQRCode;
    
    _imgVQRCode.image = imgAdaptiveQRCode;
    //设置图片视图的圆角边框效果
    _imgVQRCode.layer.masksToBounds = YES;
    _imgVQRCode.layer.cornerRadius = 10.0;
    _imgVQRCode.layer.borderColor = [UIColor lightGrayColor].CGColor;
    _imgVQRCode.layer.borderWidth = 4.0;
}


#pragma mark 点击编辑区域以外的地方
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    
    if (![self.textField isExclusiveTouch]) {
        [self.textField resignFirstResponder];
    }
}


- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end