UIColor+Hex.h
//
// UIColor+Hex.h
// ColorDemo
//
// Created by 黃健 on 16/7/22.
// Copyright © 2016年 黃健. All rights reserved.
//
#import <UIKit/UIKit.h>
#define HexRandomColor [UIColor hj_randomColor]
#define HexStringColor(string) [UIColor hj_colorWithHexString:string]
#define HexRGBColor(R, G, B) [UIColor hj_colorWith8BitRed:R green:G blue:B]
@interface UIColor (Hex)
+ (UIColor *)hj_randomColor;
+ (UIColor *)hj_colorWithHexString:(NSString *)color;
+ (UIColor *)hj_colorWithHexString:(NSString *)color alpha:(CGFloat)alpha;
+ (UIColor *)hj_colorWith8BitRed:(NSInteger)red green:(NSInteger)green blue:(NSInteger)blue;
+ (UIColor *)hj_colorWith8BitRed:(NSInteger)red green:(NSInteger)green blue:(NSInteger)blue alpha:(CGFloat)alpha;
@end
UIColor+Hex.m
//
// UIColor+Hex.m
// ColorDemo
//
// Created by 黃健 on 16/7/22.
// Copyright © 2016年 黃健. All rights reserved.
//
#import "UIColor+Hex.h"
@implementation UIColor (Hex)
+ (UIColor *)hj_randomColor
{
CGFloat R = arc4random_uniform(256) / 255.0;
CGFloat G = arc4random_uniform(256) / 255.0;
CGFloat B = arc4random_uniform(256) / 255.0;
return [[self class] colorWithRed:R green:G blue:B alpha:1];
}
+ (UIColor *)hj_colorWithHexString:(NSString *)color alpha:(CGFloat)alpha
{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
if ([cString length] < 6)
{
return [UIColor clearColor];
}
if ([cString hasPrefix:@"0x"] || [cString hasPrefix:@"0X"])
{
cString = [cString substringFromIndex:2];
}
if ([cString hasPrefix:@"#"])
{
cString = [cString substringFromIndex:1];
}
if ([cString length] != 6)
{
return [UIColor clearColor];
}
NSRange range;
range.length = 2;
range.location = 0;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString 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:alpha];
}
+ (UIColor *)hj_colorWithHexString:(NSString *)color
{
return [[self class] hj_colorWithHexString:color alpha:1.f];
}
+ (UIColor *)hj_colorWith8BitRed:(NSInteger)red green:(NSInteger)green blue:(NSInteger)blue alpha:(CGFloat)alpha
{
return [UIColor colorWithRed:(float)red/255 green:(float)green/255 blue:(float)blue/255 alpha:alpha];
}
+ (UIColor *)hj_colorWith8BitRed:(NSInteger)red green:(NSInteger)green blue:(NSInteger)blue
{
return [[self class] hj_colorWith8BitRed:red green:green blue:blue alpha:1.f];
}
@end