65 lines
2.3 KiB
Mathematica
65 lines
2.3 KiB
Mathematica
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// UIImage+Extender.m
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// FashionApp
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//
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// Created by 1 on 2018/5/24.
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// Copyright © 2018年 1. All rights reserved.
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//
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#import "UIImage+Extender.h"
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@implementation UIImage (Extender)
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+ (UIImage *)imageWithColor:(UIColor*)color size:(CGSize)size
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{
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CGRect rect =CGRectMake(0,0, size.width, size.height);
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UIGraphicsBeginImageContext(rect.size);
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CGContextRef context =UIGraphicsGetCurrentContext();
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CGContextSetFillColorWithColor(context, [color CGColor]);
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CGContextFillRect(context, rect);
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UIImage *image =UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return image;
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}
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+ (UIImage *)createViewImage:(UIView *)shareView
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{
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UIGraphicsBeginImageContextWithOptions(shareView.bounds.size, NO, [UIScreen mainScreen].scale);
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CGContextRef contextRef = UIGraphicsGetCurrentContext();
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CGContextSetRGBFillColor(contextRef, 0.0, 0.0, 0.0, 0.0);
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[shareView.layer renderInContext:contextRef];
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UIImage * image = UIGraphicsGetImageFromCurrentImageContext();
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UIGraphicsEndImageContext();
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return image;
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}
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// 二维码图片增加清晰度
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+ (UIImage *)createUIImageFormCIImage:(CIImage *)image withSize:(CGSize)size {
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CGRect extent = CGRectIntegral(image.extent);
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CGFloat scale = MIN(size.width/CGRectGetWidth(extent), size.height/CGRectGetHeight(extent));
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// 1.创建bitmap;
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size_t width = CGRectGetWidth(extent) * scale;
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size_t height = CGRectGetHeight(extent) * scale;
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CGColorSpaceRef cs = CGColorSpaceCreateDeviceGray();
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CGContextRef bitmapRef = CGBitmapContextCreate(nil, width, height, 8, 0, cs, (CGBitmapInfo)kCGImageAlphaNone);
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CIContext *context = [CIContext contextWithOptions:nil];
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CGImageRef bitmapImage = [context createCGImage:image fromRect:extent];
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CGContextSetInterpolationQuality(bitmapRef, kCGInterpolationNone);
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CGContextScaleCTM(bitmapRef, scale, scale);
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CGContextDrawImage(bitmapRef, extent, bitmapImage);
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// 2.保存bitmap到图片
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CGImageRef scaledImage = CGBitmapContextCreateImage(bitmapRef);
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CGContextRelease(bitmapRef);
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CGImageRelease(bitmapImage);
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CGColorSpaceRelease(cs);
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UIImage *qrcodeImage = [UIImage imageWithCGImage:scaledImage];
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CGImageRelease(scaledImage);
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return qrcodeImage;
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}
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@end
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