iOS 十六进制颜色字符串转为UIColor —— HERO博客

iOS 十六进制颜色字符串转为UIColor ，下面贴上代码：

#import <UIKit/UIKit.h>

@interface UIColor (PN)

/**
* 16进制转化RGB
*/
+ (UIColor *)colorWithHexString:(NSString *)string;

/**
* 随即色
*/
+ (UIColor *)randomColor;

@end

#import "UIColor+PN.h"

@implementation UIColor (PN)

+ (UIColor *)colorWithHexString:(NSString *)string
{
if ([string hasPrefix:@"#"])
string = [string substringFromIndex:1];

// Separate into r, g, b substrings
NSRange range;
range.length = 2;

range.location = 0;
NSString *rString = [string substringWithRange:range];

range.location = 2;
NSString *gString = [string substringWithRange:range];

range.location = 4;
NSString *bString = [string substringWithRange:range];

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];
}

+ (UIColor *)randomColor
{
CGFloat red = arc4random_uniform(256);
CGFloat green = arc4random_uniform(256);
CGFloat blue = arc4random_uniform(256);

return [UIColor colorWithRed:red/255.0 green:green/255.0 blue:blue/255.0 alpha:1];
}

@end