IOS 创建一张有颜色的UIImage

#import <UIKit/UIKit.h>

@interface UIImage (ImageWithColor)

+ (UIImage *)imageWithColor:(UIColor *)color;

@end

#import "UIImage+ImageWithColor.h"

@implementation UIImage (ImageWithColor)

+ (UIImage *)imageWithColor:(UIColor *)color
{
    CGRect rect = CGRectMake(0, 0, 1, 1);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();

    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);

    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return image;
}

@end

// 使用

UIColor *purpleColor = [UIColor colorWithRed:.927f green:.264f blue:.03f alpha:1];

UIImage *image = [UIImage imageWithColor:purpleColor];