代碼如下:
#import@interface UIImage (mask)
/**
*? 在一張背景圖上繪制文字并且居中
*
*? @param str? ? ? 要繪制到圖片上的文字
*? *
*
*/
+ (UIImage *)createOtherMerchantImage:(NSString *)str? size:(CGSize)size;
@end
#import "UIImage+mask.h
"@implementation UIImage (mask)
+ (UIImage *)createOtherMerchantImage:(NSString *)str? size:(CGSize)size{? ? ? ? ? NSString * substring = [str substringFromIndex:str.length-2];? ? ?
?? int texthash = (int)[str hash];? ?
?texthash=abs(texthash)+1;? ?
?int lastNum=texthash%10;? ?
?if (lastNum>=5) {? ? ? ?
?lastNum=lastNum-5;??
? }? ? ? ?
?NSArray* colorArr=@[
[UIColor colorWithRed:237/255.0f green:151/255.0f blue:151/255.0f alpha:1.0],
[UIColor colorWithRed:237/255.0f green:197/255.0f blue:151/255.0f alpha:1.0],
[UIColor colorWithRed:151/255.0f green:198/255.0f blue:237/255.0f alpha:1.0],
[UIColor colorWithRed:145/255.0f green:224/255.0f blue:152/255.0f alpha:1.0],
[UIColor colorWithRed:176/255.0f green:164/255.0f blue:162/255.0f alpha:1.0],
];
NSDictionary * fontAttributes = @{
NSFontAttributeName:[UIFont systemFontOfSize:15],//設(shè)置文字的字體
NSForegroundColorAttributeName: [UIColor whiteColor]
};
CGSize textSize = [substring sizeWithAttributes:fontAttributes];
CGPoint drawPoint = CGPointMake((size.width - textSize.width)/2, (size.height - textSize.height)/2);
UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
CGContextRef context = UIGraphicsGetCurrentContext();
UIBezierPath *path = [UIBezierPath bezierPathWithOvalInRect:CGRectMake(0, 0, size.width, size.height)];
CGContextSetFillColorWithColor(context, colorArr[lastNum].CGColor);
[path fill];
[substring drawAtPoint:drawPoint withAttributes:fontAttributes];
UIImage *resultImg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return resultImg;
}
@end
