删除导航栏/搜索栏底部的黑线

Question

I want to make a clean white Design. So, I set the tintColor property to whiteColor , but there are these dark Lines under the UINavigationBar and UISearchBar .

Do some one know, how to remove the dark Lines or how to change the Color?

Answer 1

add a method to UIImage by category

+ (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 *theImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return theImage;
}

and just set

[self.navigationController.navigationBar setShadowImage:[UIImage imageWithColor:[UIColor whiteColor]]];

Answer 2

This is what I did, and seemed to work, it is a further development of this link. I changed the explicit width declaration to a dynamic one, so that it will be the size of the view if you change view size or not:

UIView *overlayView = [[UIView alloc] initWithFrame:CGRectMake(0, 43, self.view.frame.size.width, 1)];
[overlayView setBackgroundColor:[UIColor whiteColor]];
[navBar addSubview:overlayView]; // navBar is your UINavigationBar instance
[overlayView release];

I found the stuff here: How to remove UINavigatonItem's border line

Answer 3

从iOS 7开始，UINavigationBar具有shadowImage属性，您可以将其设置为nil。