iOS：UICollectionView的子类化创建

UICollectionView的创建基本与UITableView的创建方式相同

首先，创建继承于UICollectionView的子类

然后在初始化方法中设置一些属性

– (id)initWithFrame:(CGRect)frame{UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];flowLayout.minimumInteritemSpacing = 0; //列间距flowLayout.minimumLineSpacing = 0;//行间距self = [super initWithFrame:frame collectionViewLayout:flowLayout];if (self) {//隐藏滑块self.showsHorizontalScrollIndicator = NO;self.showsVerticalScrollIndicator = NO;//设置代理self.delegate = self;self.dataSource = self;//设置背景颜色（默认黑色）self.backgroundColor = [UIColor whiteColor];//注册单元格[self registerClass:[YSStudentStatusCell class] forCellWithReuseIdentifier:identify];}return self;}collectionView的协议方法基本与tableView的相同，主要区别在于cell的创建与头视图的创建

先看cell的创建

<p class="p1"></p><p class="p1">//创建cell</p><p class="p1">- (<span class="s1">UICollectionViewCell</span> *)collectionView:(<span class="s1">UICollectionView</span> *)collectionView cellForItemAtIndexPath:(<span class="s1">NSIndexPath</span> *)indexPath</p><p class="p1">{</p><p class="p1">    <span class="s2">ModelStudent</span> *model = <span class="s3">self</span>.<span class="s2">dataArray</span>[indexPath.<span class="s1">item</span>];</p><p class="p1"> //子类化的cell</p><p class="p2"><span class="s4">    </span><span class="s2">YSStudentStatusCell</span><span class="s4"> *cell = [collectionView </span>dequeueReusableCellWithReuseIdentifier<span class="s4">:</span><span class="s2">identify</span><span class="s4"> </span>forIndexPath<span class="s4">:indexPath];</span></p><p class="p1">    [cell <span class="s5">configureWithModel</span>:model.<span class="s2">StuUserInfo</span>];</p><p class="p1">    <span class="s3">return</span> cell;</p><p class="p1">}</p>

collectionView的子类化cell创建的初始化方法如下，我用init不执行

– (id)initWithFrame:(CGRect)frame{self = [super initWithFrame:frame];if (self) {[self initView];}return self;}collectionView头视图的创建，，首先需要注册头视图，注册demo我一般与cell注册写在一块

//collection头视图的注册[self registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"Identifierhead"];创建头视图的协议方法

//组的头视图创建- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath{UICollectionReusableView *headView = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"Identifierhead" forIndexPath:indexPath];headView.backgroundColor = [UIColor blueColor];return headView;}

另外说明一下 flowLayout 的使用

flowLayout可以说是collectionView的布局属性，设置不同 flowLayout ，可以加载出不同的collectionView的布局式样

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