- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions {
// Override point for customization after application launch.
self.window= [[UIWindowalloc]initWithFrame:[UIScreenmainScreen].bounds];
self.window.backgroundColor= [UIColorwhiteColor];
[self.windowmakeKeyAndVisible];
ViewController*viewCon = [[ViewControlleralloc]init];
UINavigationController*navCon = [[UINavigationControlleralloc]initWithRootViewController:viewCon];
//设置导航栏背景颜色
navCon.navigationBar.barTintColor= [UIColorcolorWithRed:13.0/255green:125.0/255blue:220.0/255alpha:1];
//设置导航栏不透明，透明时，导航栏在屏幕最上层，即设置Subview的frame是加64，不透明时，导航栏与ViewController在同一层，即设置Subview的frame是不加64
[navCon.navigationBarsetTranslucent:NO];
UIImageView*navBarHairlineImageView = [selffindHairlineImageViewUnder:navCon.navigationBar];
navBarHairlineImageView.hidden=YES;
self.window.rootViewController= navCon;
returnYES;
}
//通过一个方法来找到这个黑线(findHairlineImageViewUnder):
- (UIImageView*)findHairlineImageViewUnder:(UIView*)view {
if([viewisKindOfClass:UIImageView.class] && view.bounds.size.height<=1.0) {
return(UIImageView*)view;
}
for(UIView*subviewinview.subviews) {
UIImageView*imageView = [selffindHairlineImageViewUnder:subview];
if(imageView) {
returnimageView;
}
}
returnnil;
}
