用指定颜色生成指定尺寸的图片

特别注意需要UIKit框架

#import <UIKit/UIKit.h>

#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
//需要UIKit框架
@interface YFCreateImage : NSObject

/**用指定颜色生成指定尺寸的图片*/
-(UIImage *)createImageWithColor:(UIColor *)color size:(CGSize)size;

@end

#import "YFCreateImage.h"

@implementation YFCreateImage
/**用指定颜色生成指定尺寸的图片*/
-(UIImage *)createImageWithColor:(UIColor *)color size:(CGSize)size
{
    CGRect rect = CGRectMake(0.0f,0.0f,size.width,size.height);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context =UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *myImage =UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return myImage;
}
@end

也可以更换为下面方法使用

+(UIImage *)createImageWithColor:(UIColor *)color size:(CGSize)size;