十六进制颜色转换为iOS可以用的UIColor

//

//  UIColor+Transformation.h

//  ContactApp

//

//  Created by 袁冬冬 on 15/9/11.

//  Copyright (c) 2015年 . All rights reserved.

//

#import <UIKit/UIKit.h>

@interface UIColor (Transformation)

+ (UIColor *)transformat:(NSString *)colorString;

@end

//

//  UIColor+Transformation.m

//  ContactApp

//

//  Created by 袁冬冬 on 15/9/11.

//  Copyright (c) 2015年 . All rights reserved.

//

#import "UIColor+Transformation.h"

@implementation UIColor (Transformation)

+ (UIColor *)transformat:(NSString *)colorString {

//去掉十六进制的#例如（#FFFFFF）

NSString *newColorString = [colorString substringFromIndex:1];

NSRange r1 = {0,2};

NSRange r2 = {2,2};

NSRange r3 = {4,2};

NSString *redStr = [newColorString substringWithRange:r1];

NSString *greenStr = [newColorString substringWithRange:r2];

NSString *blueStr = [newColorString substringWithRange:r3];

ColorBlock([redStr substringToIndex:1]);

int red = [ColorBlock([redStr substringToIndex:1]) intValue] * 16 + [ColorBlock([redStr substringFromIndex:1]) intValue];

int green = [ColorBlock([greenStr substringToIndex:1]) intValue] * 16 + [ColorBlock([greenStr substringFromIndex:1]) intValue];

int blue = [ColorBlock([blueStr substringToIndex:1]) intValue] * 16 + [ColorBlock([blueStr substringFromIndex:1]) intValue];

float r = red / 255.0;

float g = green / 255.0;

float b = blue / 255.0;

UIColor *c = [UIColor colorWithRed:r green:g blue:b alpha:1.0];

return c;

}

NSString * (^ColorBlock)(NSString *) = ^(NSString *str) {

if([str isEqualToString:@"A"]){

str = @"10";

}else if ([str isEqualToString:@"B"]){

str = @"11";

}else if ([str isEqualToString:@"C"]){

str = @"12";

}

else if ([str isEqualToString:@"D"]){

str = @"13";

}

else if ([str isEqualToString:@"E"]){

str = @"14";

}else if ([str isEqualToString:@"F"]){

str = @"15";

}

return str;

};

@end