标题左右滚动和页面左右轮播的效果请参考：http://www.jianshu.com/p/b45655e23a42
标题向上滚动到屏幕之外的效果是使用代理方法完成的，具体如下：
@protocol ODHideNavBarDelegate <NSObject>
– (void)hideNavBar:(BOOL)needHide;
@end
– (void)scrollViewDidScroll:(UIScrollView *)scrollView{
if (self.tableView.contentOffset.y > 100) {
[self.delegate hideNavBar:YES];
}else{
[self.delegate hideNavBar:NO];
}
}
– (void)hideNavBar:(BOOL)needHide{
if (needHide == YES) {
[UIView animateWithDuration:0.5 animations:^{
self.titleLabel.y = –50;
self.leaveBtn.y = –50;
[self setUpContentViewFrame:^(UIView *contentView) {
contentView.frame = CGRectMake(0,20, kWidthOfScreen, kHeightOfScreen);
}];
}];
}
if (needHide == NO) {
[UIView animateWithDuration:0.5 animations:^{
self.titleLabel.y = 20;
self.leaveBtn.y = 20;
[self setUpContentViewFrame:^(UIView *contentView) {
contentView.frame = CGRectMake(0,64, kWidthOfScreen, kHeightOfScreen);
}];
}];
}
}