IOS_ Random獲取隨機顏色值

本羣【ken_深圳】的第一次分享

來自Ken的獨白：由於真正接觸IOS就幾個月，也木有什麼存儲箱，就拿以前剛學的是的一個自定義顏色類

.h 文件

#import <UIKit/UIKit.h>

//category for class of UIColor
@interface UIColor(Random)

//create random color
+ (UIColor *)randomColor;//隨機顏色

+ (UIColor *) getColor: (NSString *) hexColor;//獲得顏色

@end

.m文件

#import "UIColor_Random.h"

@implementation UIColor(Random)


//create random color
+ (UIColor *)randomColor {
	static BOOL seeded = NO;
	if (!seeded) {
		seeded = YES;		
        (time(NULL));
	}
	CGFloat red = (CGFloat)random() / (CGFloat)RAND_MAX;
	CGFloat green = (CGFloat)random() / (CGFloat)RAND_MAX;
	CGFloat blue = (CGFloat)random() / (CGFloat)RAND_MAX;
	return [UIColor colorWithRed:red green:green blue:blue alpha:1.0f];
}


+ (UIColor *) getColor: (NSString *) hexColor

{
	
	unsigned int red, green, blue;
	
	NSRange range;
	
	range.length = 2;
	
	range.location = 0;
	
	[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&red];
	
	range.location = 2;
	
	[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&green];
	
	range.location = 4;
	
	[[NSScanner scannerWithString:[hexColor substringWithRange:range]] scanHexInt:&blue];
	
	return [UIColor colorWithRed:(float)(red/255.0f) green:(float)(green/255.0f) blue:(float)(blue/255.0f) alpha:0.35f];
	
}



@end

小編：

真是難爲IOS兄了，不過寫總結對自身是很有好處的，希望以後多多分享。