最近公司项目里有一处文本需要设置不同颜色，而后台传过来的是16进制的颜色（如：#FF6666），想要把16进制的颜色转换成UIColor类型的，只需要写一个方法就行：
- (UIColor *)colorWithHexColorString:(NSString *)hexColorString{
if ([hexColorString length] <6){//长度不合法
return [UIColor clearColor];
}
NSString *tempString=[hexColorString lowercaseString];
if ([tempString hasPrefix:@"0X"]){//检查开头是0x
tempString = [tempString substringFromIndex:2];
}
else if ([tempString hasPrefix:@"#"]){//检查开头是#
tempString = [tempString substringFromIndex:1];
}
if ([tempString length] != 6){
return [UIColor clearColor];
}
//分解三种颜色的值
NSRange range;
range.location = 0;
range.length = 2;
// r
NSString *rString = [tempString substringWithRange:range];
// g
range.location = 2;
NSString *gString = [tempString substringWithRange:range];
// b
range.location = 4;
NSString *bString = [tempString substringWithRange:range];
//取三种颜色值
unsigned int r, g, b;
[[NSScanner scannerWithString:rString]scanHexInt:&r];
[[NSScanner scannerWithString:gString]scanHexInt:&g];
[[NSScanner scannerWithString:bString]scanHexInt:&b];
return [UIColor colorWithRed:((float) r /255.0f)
green:((float) g /255.0f)
blue:((float) b /255.0f)
alpha:1.0f];
}
然后调用
self.label.textColor = [self colorWithHexColorString:@"#FF6666"];
就OK了。
