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"]];