- (void)viewWillAppear:(BOOL)animated {
[superviewWillAppear:animated];
//将状态栏内容颜色设置为白色(写在这里避免子界面返回到主界面时状态栏的颜色由黑色变成白色的变化效果)
[[UIApplication sharedApplication]setStatusBarStyle:UIStatusBarStyleLightContentanimated:YES];
[self.navigationControllersetNavigationBarHidden:YESanimated:NO];
UIView*navView = [[UIViewalloc]initWithFrame:CGRectMake(0,0,WJScreenWidth,64)];
navView.backgroundColor= [UIColorclearColor];
UILabel*navTitle = [[UILabelalloc]init];
self.navTitle= navTitle;
navTitle.hidden= YES;
navTitle.size= CGSizeMake(40,20);
navTitle.center= navView.center;
navTitle.text= @"首页";
navTitle.font= [UIFontsystemFontOfSize:18];
[navTitlesetTextColor:WJRGBAColor(68,79,102,1)];
navTitle.center= navView.center;
[navViewaddSubview:navTitle];
self.navView= navView;
[self.viewinsertSubview:navViewatIndex:[self.view.subviewscount]];
}
- (void)viewWillDisappear:(BOOL)animated {
[superviewWillDisappear:animated];
[self.navigationControllersetNavigationBarHidden:NOanimated:YES];
}
-(void)scrollViewDidScroll:(UIScrollView*)scrollView {
floatalpha = 1- (64- scrollView.contentOffset.y) /64;
self.navView.backgroundColor= [[UIColorwhiteColor]colorWithAlphaComponent:alpha >1?1: alpha];
if(scrollView.contentOffset.y>0) {
self.navTitle.hidden=NO;
}else{
self.navTitle.hidden=YES;
}
if(scrollView.contentOffset.y>=64) {
[[UIApplicationsharedApplication]setStatusBarStyle:UIStatusBarStyleDefaultanimated:YES];
}else{
[[UIApplicationsharedApplication]setStatusBarStyle:UIStatusBarStyleLightContentanimated:YES];
}
}