NSString * const MTEdit = @ " edit
# define MTString(str)[ns string string with format:@“% @”，str]
@ interface MTCollectViewController()& lt；MTDealCellDelegate & gt
@property(非原子，弱)UIImageView * noDataView
@property(非原子，強)NSMutableArray * deals
@property (nonatomic，assign)int current page；
@property (nonatomic，strong)UIBarButtonItem * back item；
@property (nonatomic，strong)UIBarButtonItem * selectAllItem；
@property (nonatomic，strong)UIBarButtonItem * unselect allitem；
@property (nonatomic，strong)UIBarButtonItem * remove item；
@end
@ implementation MTCollectViewController
- (UIBarButtonItem *)backItem
{
如果(！_backItem) {
self . back item =[UIBarButtonItem item with target:self action:@ selector(back)image:@ " icon _ back " high image:@ " icon _ back _ highlight "]；
}
return _ backItem
}
- (UIBarButtonItem *)選擇所有項目
{
如果(！_selectAllItem) {
自我。select all item =[[uibarbuttonitemalloc]initwithttitle:mt string(@ " select all ")style:uibarbuttonitemstyledone target:self action:@ selector(select all)]；
}
return _ selectAllItem
}
- (UIBarButtonItem *)取消選擇項目
{
如果(！_unselectAllItem) {
自我。unselect allitem =[[uibarbuttonitemalloc]initwithttitle:mt string(@ " Select None ")style:uibarbuttonitemstyledone target:self action:@ selector(unselect all)]；
}
return _ unselectAllItem
}
- (UIBarButtonItem *)removeItem
{
如果(！_removeItem) {
self . remove item =[[uibarbuttonitemalloc]initwithttitle:mt string(@ " delete ")style:uibarbuttonitemstyledone target:self action:@ selector(remove)]；
self . remove item . enabled = NO；
}
return _ removeItem
}
- (NSMutableArray *)交易
{
如果(！_deals) {
self . deals =[[NSMutableArray alloc]init]；
}
退貨_交易；
}
- (UIImageView *)無數據視圖
{
如果(！_noDataView) {
//添加“無數據”的提醒
ui imageview * no data view =[[ui imageview alloc]init with image:[ui image image named:@ " icon _ collects _ empty "]]；
【self . view add subview:no data view】；
[no data view autocentinserview]；
self . no data view = no data view；
}
return _ noDataView
}
static ns string * const reuse identifier = @ " deal "；
-(實例類型)初始化
{
UICollectionViewFlowLayout * layout =[[UICollectionViewFlowLayout alloc]init]；
//單元格的大小
layout.itemSize = CGSizeMake(305，305)；
return[self initWithCollectionViewLayout:layout]；
}
- (void)viewDidLoad {
【超級viewDidLoad】；
Self.title = @ "團購收藏"；
self . collection view . background color = MTGlobalBg；
//在左側返回
self . navigation item . leftbarbuttonitems = @[self . back item]；
//註冊單元格類
[self . collection view register nib:[UINib nibWithNibName:@ " mtdealcoell " bundle:nil]forCellWithReuseIdentifier:reuseIdentifier]；
self . collection view . alwaysbouncevertical = YES；
//加載第壹頁的收藏夾數據。
[self loadMoreDeals]；
//偵聽收集狀態更改的通知。
[MTNotificationCenter add observer:self selector:@ selector(collectStateChange:)name:MTCollectStateDidChangeNotification object:nil]；
//添加並加載。
[self . collection view addFooterWithTarget:self action:@ selector(loadmoreandles)]；
//設置導航欄內容
self . navigation item . rightbarbuttonitem =[[UIBarButtonItem alloc]init with title:MTEdit style:UIBarButtonItemStyleDone目標:self action:@ selector(edit:)；
}
- (void)編輯:(UIBarButtonItem *)項目
{
if([item . title isEqualToString:MTEdit]){
item.title = MTDone
self . navigation item . leftbarbuttonitems = @[self . back item，self.selectAllItem，self.unselectAllItem，self . remove item]；
//進入編輯狀態。
for (MTDeal *deal in self.deals) {
deal.editing =是；
}
}否則{
item.title = MTEdit
self . navigation item . leftbarbuttonitems = @[self . back item]；
//結束編輯狀態
for (MTDeal *deal in self.deals) {
deal.editing =否；
}
}
//刷新表格
[self . collection view reload data]；
}
- (void)選擇全部
{
for (MTDeal *deal in self.deals) {
deal.checking =是；
}
[self . collection view reload data]；
self . remove item . enabled = YES；
}
- (void)取消選擇
{
for (MTDeal *deal in self.deals) {
deal.checking =否；
}
[self . collection view reload data]；
self . remove item . enabled = NO；
}
-(無效)刪除
{
NSMutableArray * tempArray =[NSMutableArray數組]；
for (MTDeal *deal in self.deals) {
if (deal.isChecking) {
[MTDealTool removeCollectDeal:deal]；
[tempArray add object:deal]；
}
}
//刪除所有選中的模型。
[self . deals removeObjectsInArray:tempArray]；
[self . collection view reload data]；
self . remove item . enabled = NO；
}
- (void)加載更多交易
{
// 1.增加頁碼
self . current page++；
// 2.添加新數據
[self . deals addObjectsFromArray:[MTDealTool collect deals:self . current page]]；
// 3.刷新表格
[self . collection view reload data]；
// 4.結束刷新
[self . collection view footerEndRefreshing]；
}
-(void)collectStateChange:(ns notification *)通知
{
//if([notification . userinfo[MTIsCollectKey]boolValue]){
////收集成功
//[self . deals insertObject:notification . userinfo[MTCollectDealKey]at index:0]；
// }其他{
////已成功取消收集
//[self . deals remove object:notification . userinfo[MTCollectDealKey]]；
// }
//
//[self . collection view reload data]；
[self . deals remove all objects]；
self . current page = 0；
[self loadMoreDeals]；
}
-(無效)返回{
[self dismissViewControllerAnimated:是完成:無]；
}
#雜註標記-單元格的代理
-(void)dealCellCheckingStateDidChange:(mtdealcoell *)單元格
{
BOOL hasChecking = NO
for (MTDeal *deal in self.deals) {
if (deal.isChecking) {
hasChecking = YES
打破；
}
}
//根據是否有復選框來決定刪除按鈕是否可用。
self . remove item . enabled = has checking；
}
/**
當屏幕旋轉時，控制器視圖的大小會改變。
*/
-(void)viewlltransitiontosize:(CGSize)size with transition coordinator:(id & lt；UIViewControllerTransitionCoordinator & gt；)協調員
{
//根據屏幕寬度確定列數。
int cols =(size . width = = 1024)？3 : 2;
//根據列數計算內邊距。
UICollectionViewFlowLayout * layout =(UICollectionViewFlowLayout *)self . collectionview layout；
CG float inset =(size . width-cols * layout . itemsize . width)/(cols+1)；
layout . section Inset = uiedgeinsets make(inset，inset，inset，inset)；
//設置每行之間的間距。
layout.minimumLineSpacing = 50
}
# pragma mark & ltUICollectionViewDataSource & gt
-(NSInteger)collection view:(UICollectionView *)collection view number of itemsinsection:(NSInteger)section {
//計算壹次內邊距。
[self view willtransitiontosize:CGSizeMake(collection view . width，0)with transition coordinator:nil]；
//控制尾部控件的顯示和隱藏。
self . collection view . footer hidden =(self . deals . count = =[MTDealTool collectDealsCount])；
//控制“無數據”的提醒
self . no data view . hidden =(self . deals . count！= 0);
返回self . deals . count；
}
-(UICollectionView cell *)collection view:(UICollectionView *)collection view cellForItemAtIndexPath:(NSIndexPath *)index path {
MTDealCell * cell =[collection view dequeueReusableCellWithReuseIdentifier:reuseIdentifier for index path:index path]；
cell.delegate = self
cell . deal = self . deals[index path . item]；
返回單元格；
}
# pragma mark & ltUICollectionViewDelegate & gt
-(void)collection view:(UICollectionView *)collection view didSelectItemAtIndexPath:(NSIndexPath *)index path
{
MTDetailViewController * detail VC =[[MTDetailViewController alloc]init]；
detail VC . deal = self . deals[index path . item]；
[self present view controller:detail VC animated:YES completion:nil]；
}