导航条在个别界面中透明处理
我们平时在写界面的时候，会遇到，要把某个界面的导航条给隐藏起来 而其他界面中，而在隐藏的时候又会有条黑线出现，加个动画来处理就行了，又要有导航条，那么我们就可以在控制器的viewWillAppear、viewWillDisappear来做处理：
- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:animated];
[UIView animateWithDuration:1 animations:^{
[[[self.navigationController.navigationBar subviews] objectAtIndex:0] setAlpha:0];
//设置导航栏透明
UINavigationBar *navBar = [UINavigationBar appearance];
navBar.shadowImage = [UIImage new];
self.edgesForExtendedLayout=UIRectEdgeTop;
navBar.translucent = YES;
self.automaticallyAdjustsScrollViewInsets=NO;
self.extendedLayoutIncludesOpaqueBars = YES;
}];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
[[[self.navigationController.navigationBar subviews] objectAtIndex:0] setAlpha:1];
// return;
UINavigationBar *navBar = [UINavigationBar appearance];
navBar.shadowImage = [UIImage new];
[navBar setBackgroundImage:[UIImage imageWithColor:UIColorFromRGB(0x1f9bfd)] forBarMetrics:UIBarMetricsDefault];
self.edgesForExtendedLayout=UIRectEdgeNone;
navBar.translucent = NO;
self.automaticallyAdjustsScrollViewInsets=YES;
self.extendedLayoutIncludesOpaqueBars = NO;
}
