修改NavigationBar的分根线颜色

[self.navigationController.navigationBar setShadowImage:[Static ColorToImage:[Static colorWithHexString:[UIColor red]]]];

 

Static 里的几个静态方法

+ (UIImage *)ColorToImage:(UIColor *)color{CGRect rect=CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);UIGraphicsBeginImageContext(rect.size);CGContextRef context = UIGraphicsGetCurrentContext();CGContextSetFillColorWithColor(context, [color CGColor]);CGContextFillRect(context, rect);UIImage *theImage = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();return theImage;}

 

 

+ (UIColor *) colorWithHexString: (NSString *)color{NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];if ([cString length] < 6) {return [UIColor clearColor];}if ([cString hasPrefix:@"0X"])cString = [cString substringFromIndex:2];if ([cString hasPrefix:@"#"])cString = [cString substringFromIndex:1];if ([cString length] != 6)return [UIColor clearColor];// 拆分
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
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];}