#import <UIKit/UIKit.h>@interface UIColor (Hex)
+ (UIColor *) colorWithHexString: (NSString *)color;
@end

#import "UIColor+Hex.h"@implementation UIColor (Hex)#pragma mark - 颜色转换 iOS中十六进制的颜色转换为UIColor+ (UIColor *) colorWithHexString: (NSString *)hexString
{NSString *cString = [[hexString stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];//hexString应该6到8个字符if ([cString length] < 6) {return [UIColor clearColor];}//如果hexString 有@"0X"前缀if ([cString hasPrefix:@"0X"])cString = [cString substringFromIndex:2];//如果hexString 有@"#""前缀if ([cString hasPrefix:@"#"])cString = [cString substringFromIndex:1];if ([cString length] != 6)return [UIColor clearColor];//RGB转换
    NSRange range;range.location = 0;range.length = 2;//RNSString *rString = [cString substringWithRange:range];//Grange.location = 2;NSString *gString = [cString substringWithRange:range];//Brange.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:1.0f];
}@end

//1、添加头文件
#import "UIColor+Hex.h"//2、在需要的地方 [UIColor colorWithHexString:@"十六进制"]
//eg:
[self.view setBackgroundColor:[UIColor colorWithHexString:@"#11489B"]];