iOS 十六进制背景颜色封装
1.给UIColor添加一个类目--category---小白哥我直接上代码了
//
// UIColor+Dubai_Color.h
// ZGD_ColorDemo
//
// Created by zhaoguodong on 15/10/30.
// Copyright © 2015年 zhaoguodong. All rights reserved.
//
#import
@interface UIColor (Dubai_Color)
+ (UIColor*)dubaiColorWithHexString:(NSString*)hex;
+ (UIColor*)dubaiColorWithHexString:(NSString*)hex withAlpha:(CGFloat)alpha;
@end
//
// UIColor+Dubai_Color.m
// ZGD_ColorDemo
//
// Created by zhaoguodong on 15/10/30.
// Copyright © 2015年 zhaoguodong. All rights reserved.
//
#import "UIColor+Dubai_Color.h"
@implementation UIColor (Dubai_Color)
+ (UIColor*)dubaiColorWithHexString:(NSString*)hex
{
NSString *cString = [[hex stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// strip 0X if it appears
if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
// strip # if it appears
if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
if ([cString length] != 6) return [UIColor grayColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
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];
}
+ (UIColor*)dubaiColorWithHexString:(NSString*)hex withAlpha:(CGFloat)alpha
{
NSString *cString = [[hex stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// strip 0X if it appears
if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
// strip # if it appears
if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
if ([cString length] != 6) return [UIColor grayColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
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:alpha];
}
@end
//
// UIColor+Dubai_Color.m
// ZGD_ColorDemo
//
// Created by zhaoguodong on 15/10/30.
// Copyright © 2015年 zhaoguodong. All rights reserved.
//
#import "UIColor+Dubai_Color.h"
@implementation UIColor (Dubai_Color)
+ (UIColor*)dubaiColorWithHexString:(NSString*)hex
{
NSString *cString = [[hex stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// strip 0X if it appears
if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
// strip # if it appears
if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
if ([cString length] != 6) return [UIColor grayColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
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];
}
+ (UIColor*)dubaiColorWithHexString:(NSString*)hex withAlpha:(CGFloat)alpha
{
NSString *cString = [[hex stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// strip 0X if it appears
if ([cString hasPrefix:@"0X"]) cString = [cString substringFromIndex:2];
// strip # if it appears
if ([cString hasPrefix:@"#"]) cString = [cString substringFromIndex:1];
if ([cString length] != 6) return [UIColor grayColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
NSString *rString = [cString substringWithRange:range];
range.location = 2;
NSString *gString = [cString substringWithRange:range];
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
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:alpha];
}
@end