iOS去掉导航栏底部的线
第一种方法:
UINavigationBar *navigationBar = self.navigationController.navigationBar;
// white.png图片自己下载个纯白色的色块,或者自己ps做一个
[navigationBar setBackgroundImage:[UIImage imageNamed:@"white.png"]
forBarPosition:UIBarPositionAny
barMetrics:UIBarMetricsDefault];
[navigationBar setShadowImage:[UIImage new]];
运行后效果如下(此处原有的灰色背景色会被white.png代替):
PS:这是唯一一个隐藏这条线的官方用法,但是有一个缺陷-删除了translucency(半透明)
第二种方法:
1)声明UIImageView变量,存储底部横线
@implementation MyViewController {
UIImageView *navBarHairlineImageView;
}
2)在viewDidLoad中加入:
navBarHairlineImageView = [self findHairlineImageViewUnder:navigationBar];
3)实现找出底部横线的函数
- (UIImageView *)findHairlineImageViewUnder:(UIView *)view {
if ([view isKindOfClass:UIImageView.class] && view.bounds.size.height <= 1.0) {
return (UIImageView *)view;
}
for (UIView *subview in view.subviews) {
UIImageView *imageView = [self findHairlineImageViewUnder:subview];
if (imageView) {
return imageView;
}
}
return nil;
}
4)最后在viewWillAppear,viewWillDisappear中处理
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
navBarHairlineImageView.hidden = YES;
}
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
navBarHairlineImageView.hidden = NO;
}
PS:第二种方法可以保持bar的translucent