UIColor+Hex.h
// // UIColor+Hex.h // 16进制颜色类别 // // Created by apple on 15-4-3. // Copyright (c) 2015年 apple. All rights reserved. // #import <UIKit/UIKit.h> #define RGBA_COLOR(R, G, B, A) [UIColor colorWithRed:((R) / 255.0f) green:((G) / 255.0f) blue:((B) / 255.0f) alpha:A] #define RGB_COLOR(R, G, B) [UIColor colorWithRed:((R) / 255.0f) green:((G) / 255.0f) blue:((B) / 255.0f) alpha:1.0f] @interface UIColor (Hex) + (UIColor *)colorWithHexString:(NSString *)color; //从十六进制字符串获取颜色, //color:支持@“#123456”、 @“0X123456”、 @“123456”三种格式 + (UIColor *)colorWithHexString:(NSString *)color alpha:(CGFloat)alpha; @end
UIColor+Hex.m
// // UIColor+Hex.m // 16进制颜色类别 // // Created by apple on 15-4-3. // Copyright (c) 2015年 apple. All rights reserved. // #import "UIColor+Hex.h" @implementation UIColor (Hex) + (UIColor *)colorWithHexString:(NSString *)color alpha:(CGFloat)alpha { //删除字符串中的空格 NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString]; // String should be 6 or 8 characters if ([cString length] < 6) { return [UIColor clearColor]; } // strip 0X if it appears //如果是0x开头的,那么截取字符串,字符串从索引为2的位置开始,一直到末尾 if ([cString hasPrefix:@"0X"]) { cString = [cString substringFromIndex:2]; } //如果是#开头的,那么截取字符串,字符串从索引为1的位置开始,一直到末尾 if ([cString hasPrefix:@"#"]) { cString = [cString substringFromIndex:1]; } if ([cString length] != 6) { return [UIColor clearColor]; } // Separate into r, g, b substrings NSRange range; range.location = 0; range.length = 2; //r NSString *rString = [cString substringWithRange:range]; //g range.location = 2; NSString *gString = [cString substringWithRange:range]; //b range.location = 4; NSString *bString = [cString substringWithRange:range]; // Scan values 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]; } //默认alpha值为1 + (UIColor *)colorWithHexString:(NSString *)color { return [self colorWithHexString:color alpha:1.0f]; } @end
时间: 2024-10-20 07:31:06