iOS 十六进制的颜色值转换为UIColor

UIColor+Hex.h里面中

#import <UIKit/UIKit.h>

@interface UIColor (Hex)
+ (UIColor *) colorWithHexString: (NSString *)color;
@end

UIColor+Hex.m里面中

#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] < ) {
        return [UIColor clearColor];
    }

    //如果hexString 有@"0X"前缀
    if ([cString hasPrefix:@"0X"])
        cString = [cString substringFromIndex:];

    //如果hexString 有@"#""前缀
    if ([cString hasPrefix:@"#"])
        cString = [cString substringFromIndex:];
    if ([cString length] != )
        return [UIColor clearColor];

    //RGB转换
    NSRange range;
    range.location = ;
    range.length = ;

    //R
    NSString *rString = [cString substringWithRange:range];

    //G
    range.location = ;
    NSString *gString = [cString substringWithRange:range];

    //B
    range.location = ;
    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

使用方法：

//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"]];