LXMExpandLayout

A UICollectionViewLayout that can expand one item with spring animation without doing any transition, support cell with any size.

LXMExpandLayout is a imitation of DaiExpandCollectionView by @DaidoujiChen and I made several improvements to make it more easy to use.

It supports cell with any size, you can use it just like any other UICollectionViewFlowLayout, all you have to do is to set the itemSize and then all are done .

Now you can drag a item to reorder it, remember that you must implement the delegate method to insure that th order did changed.

It also works well with autoLayout, since you need only to set the item size, you may see different UI on different devices, for example:
with itemSize set to {80, 100}, you will see three items in one row on iPhone5, but you will see four on iPhone6.

##Attention there are some limitation on this LXMExpandLayout, the itemSize you set, however, you must make sure that there are at least three items in one row, otherwise it will do not work......

##Update version 0.0.4, fix some bugs, support drag to reorder
inpired by RACollectionViewReorderableTripletLayout by ra1028

version 0.0.2, support sectionInsect
now you can set the sectionInsectof LXMExpandLayout and it will work just like UICollectionViewFlowLayout

##Install ###Using cocoaPods 1, add pod 'LXMExpandLayout', '0.0.4'to your podFile
2, run pod install or pod update

###manually 1, add LXMExpandLayout.h,LXMExpandLayout.m,LXMCopiedView.h,LXMCopiedView.m to your project

##How to use 1,add #import "LXMExpandLayout.h" to your viewController
2,init a LXMExpandLayout and set it to the collectionView like this :

   LXMExpandLayout *expandLayout = [[LXMExpandLayout alloc] init];
   expandLayout.itemSize = CGSizeMake(80, 100);
   self.collectionView.collectionViewLayout = expandLayout;

ok, all is done.

3,if you want to chane a seletedItem, just call this method

[self.collectionView expandItemAtIndexPath:indexPath animated:YES];    

##Todo 1, support addItem , deleteItem and other opration
2, support multipule sections

Help

if you have any questions or suggestions, wellcome for issues and pullRequest.

License

LXMExpandLayout is available under the MIT license. See the LICENSE file for more info.

帮助

这里有一篇博客，简单总结了下该库的实现思路和遇到的坑