iOS手持证件照相机：拍身份证裁剪大小，截图截出所需大小（带拍摄区域边框及半透明遮罩层）

#import "CRMCaptureIDPic4PortraitViewController.h"



        CRMCaptureIDPic4PortraitViewController *vc = [[CRMCaptureIDPic4PortraitViewController alloc] init];
        

        
        
        
        vc.imageblock = ^(UIImage *image) {
            self.imgView.image = image;
        };
        
        
        NSMutableAttributedString *xx  = [[NSMutableAttributedString alloc]init];
        //请调整好光线，将身份证国徽面移入框内
        //请保持正脸持证于取景框内
        xx.kn_addString(@"请保持正脸持证于取景框内").kn_fontColor(rgb(255,255,255)).kn_addString(@"").kn_fontColor(rgb(225,66,66)).kn_addString(@"").kn_fontColor(rgb(255,255,255));
        
        

        

        

        vc.tip_attributedText = xx;
        
        vc.kuangImgName =  @"img_paishe_chizheng_red";

        
        
        [self presentViewController:vc animated:YES completion:nil];