下面是效果图。最重要的是实现UIScrollView的代理方法
- (void)scrollViewDidScroll:(UIScrollView*)scrollView{
//_lastcontentoffset上一次滑动的距离
if(scrollView.contentOffset.y>0) {
self.table.frame=CGRectMake(0,20,self.view.frame.size.width,self.view.frame.size.height-20);
[self.navigationControllersetNavigationBarHidden:YESanimated:YES];
if(scrollView.contentOffset.y-self.lastcontentoffset<=0) {
self.table=[[UITableViewalloc]initWithFrame:CGRectMake(0,64,self.view.frame.size.width,self.view.frame.size.height-64)];
[self.navigationController setNavigationBarHidden:NOanimated:YES];
}
}else{
self.table=[[UITableViewalloc]initWithFrame:CGRectMake(0,64,self.view.frame.size.width,self.view.frame.size.height-64)];
[self.navigationControllersetNavigationBarHidden:NOanimated:YES];
}
self.lastcontentoffset=scrollView.contentOffset.y;
}
