设置NavigationBar底部线条颜色

作者: 213dfddbef5e | 来源:发表于2017-02-27 15:54 被阅读52次

首先创建类扩展UIImage+ColorImage

@implementation UIImage (ColorImage)
+ (UIImage *)imageWithColor:(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 *image = UIGraphicsGetImageFromCurrentImageContext(); 
UIGraphicsEndImageContext(); return image;
}@end

然后

UINavigationBar *navigationBar = self.navigationController.navigationBar; 
[navigationBar setBackgroundImage:[[UIImage alloc] init] forBarPosition:UIBarPositionAny barMetrics:UIBarMetricsDefault]; // ------此处使底部线条颜色为红色
[navigationBar setShadowImage:[UIImage imageWithColor:[UIColor redColor]]];