IOS中十六进制的颜色转换为UIColor

#pragma mark - 颜色转换 IOS中十六进制的颜色转换为UIColor
+ (UIColor *) colorWithHexString: (NSString *)color
{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];

// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}

// strip 0X if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];

// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;

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

//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];

//b
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];
}

【OBJC类扩展之Hex值颜色转换】UIColor+Hex
#import <UIKit/UIKit.h>

@interface UIColor (Hex)

+ (UIColor *)colorWithHex:(long)hexColor;
+ (UIColor *)colorWithHex:(long)hexColor alpha:(float)opacity;

@end

#import "UIColor+Hex.h"

@implementation UIColor (Hex)

+ (UIColor*) colorWithHex:(long)hexColor;
{
return [UIColor colorWithHex:hexColor alpha:1.];
}

+ (UIColor *)colorWithHex:(long)hexColor alpha:(float)opacity
{
float red = ((float)((hexColor & 0xFF0000) >> 16))/255.0;
float green = ((float)((hexColor & 0xFF00) >> 8))/255.0;
float blue = ((float)(hexColor & 0xFF))/255.0;
return [UIColor colorWithRed:red green:green blue:blue alpha:opacity];
}

@end