然后为您的文本设计

CGFloat red = 0.0,green = 0.0,blue = 0.0,alpha = 0.0;
[averageColor getRed:&red green:&green blue:&blue alpha:&alpha];

int threshold = 105;
int bgDelta = ((red * 0.299) + (green * 0.587) + (blue * 0.114));

UIColor *textColor = (255 - bgDelta < threshold) ? [UIColor blackColor] : [UIColor whiteColor];

这样的东西

您还可以使用上面的链接从图像中获取UIColor,并使用matt’s category的UIColor获得亮或暗.