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两种颜色渐变

2022-04-22 23:52:00 【~废弃回忆 �༄】 


@implementation UIColor (****)

/** * @brief 渐变颜色 * * @param c1 开始颜色 * @param c2 结束颜色 * @param height 渐变高度 * * @return 渐变颜色 */
+ (UIColor*)df_jianBianFromColor:(UIColor*)c1 toColor:(UIColor*)c2 withHeight:(int)height
{
    
    CGSize size = CGSizeMake(1, height);
    UIGraphicsBeginImageContextWithOptions(size, NO, 0);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();
    
    NSArray* colors = [NSArray arrayWithObjects:(id)c1.CGColor, (id)c2.CGColor, nil];
    CGGradientRef gradient = CGGradientCreateWithColors(colorspace, (__bridge CFArrayRef)colors, NULL);
    CGContextDrawLinearGradient(context, gradient, CGPointMake(0, 0), CGPointMake(0, size.height), 0);
    
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    
    CGGradientRelease(gradient);
    CGColorSpaceRelease(colorspace);
    UIGraphicsEndImageContext();
    
    return [UIColor colorWithPatternImage:image];
}

@end

版权声明
本文为[~废弃回忆 �༄]所创，转载请带上原文链接，感谢
https://blog.csdn.net/eastWind1101/article/details/117434673

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