仙女味的棒棒糖

1.alpha的取值范围是0.0到1.0,0.0表示完全透明，1.0表示完全不透明。用alpha值来实现视图的淡入淡出是个非常好的办法。如果想令视图不经动画效果就直接消失，那么请使用hidden属性。

2.用块来构建动画效果：可以通过completion参数传入一个块，以便在动画结束之后执行清理工作。下面这段代码会对cententView运用淡出效果，并且会在动画结束之后，将其从上级视图里移除：

[UIView animationWithDuration:1.0f animations:^{contentView.alpha = 0.0f;} completion:^(BOOL done) {[contentView removeFromSuperview;};

3.Cocoa Touch所提供的NSUndoManager类可以用来反转（撤销）用户的操作。比如：为滑板添加一个撤销动作。

4.IQManagerKeyBoard包容UISearchBar？？？

Working with UISearchBar is explicitly disabled on IQKeyboardManager.

You should modify-(BOOL)isSearchBarTextFieldmethod to return NO hereIQUIView+Hierarchy.mto work with UISearchBar.

-(BOOL)isSearchBarTextField{

returnNO;}

5.去掉searchBar的黑色边框线？

[self.searchBar setBackgroundImage:[UIImage new]];

6.switch里面不能跳页

switch (indexPath.row) {
case 0:
    MyAccountViewController *myAccountVC = [[MyAccountViewController alloc]init];
   [self.navigationController pushViewController:myAccountVC animated:YES];
   break;
default:
   break;
}

这样是会报错的..需要在跳页段加个{}

switch (indexPath.row) {
case 0:
{ 
     MyAccountViewController *myAccountVC = [[MyAccountViewController alloc]init];
     [self.navigationController pushViewController:myAccountVC animated:YES];
}
   break;
default:
   break;
}