iOS开发-从16进制颜色中获取UIColor

//头文件
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>

@interface TextServcie : NSObject

+(UIColor *) getColorFromHEX:(NSString *)hex;
@end

#import "TextServcie.h"


@implementation TextServcie
+(UIColor *)getColorFromHEX:(NSString *)hex{
    hex= [[hex uppercaseString] substringFromIndex:1];
    CGFloat valueArray[3];
    NSArray *strArray=[NSArray arrayWithObjects:[hex substringWithRange:NSMakeRange(0, 2)],[hex substringWithRange:NSMakeRange(2, 2)],[hex substringWithRange:NSMakeRange(4, 2)] ,nil];
    for( int i=0;i<strArray.count;i++){
        hex=strArray[i];
        CGFloat value=([hex characterAtIndex:0]-‘A‘+10)*16.0f+[hex characterAtIndex:1]-‘A‘+10;
        valueArray[i]=value;
    }
    return [UIColor colorWithRed:valueArray[0]/255 green:valueArray[1]/255 blue:valueArray[2]/255 alpha:1];
}
@end