iOS：UICollectionView的子類化建立

標籤：ios   uikit   

UICollectionView的建立基本與UITableView的建立方式相同

首先，建立繼承於UICollectionView的子類

然後在初始化方法中設定一些屬性

- (id)initWithFrame:(CGRect)frame{    UICollectionViewFlowLayout *flowLayout = [[UICollectionViewFlowLayout alloc] init];    flowLayout.minimumInteritemSpacing = 0; //列間距    flowLayout.minimumLineSpacing = 0;      //行間距    self = [super initWithFrame:frame collectionViewLayout:flowLayout];    if (self) {        //隱藏滑塊        self.showsHorizontalScrollIndicator = NO;        self.showsVerticalScrollIndicator = NO;        //設定代理        self.delegate = self;        self.dataSource = self;        //設定背景顏色（預設黑色）        self.backgroundColor = [UIColor whiteColor];        //註冊儲存格        [self registerClass:[YSStudentStatusCell class] forCellWithReuseIdentifier:identify];    }    return self;}

collectionView的協議方法基本與tableView的相同，主要區別在於cell的建立與頭視圖的建立

先看cell的建立

<p class="p1"></p><p class="p1">//建立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">    //子類化的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的子類化cell建立的初始化方法如下，我用init不執行

- (id)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        [self initView];    }    return self;}

collectionView頭視圖的建立，首先需要註冊頭視圖，註冊demo我一般與cell註冊寫在一塊

//collection頭視圖的註冊        [self registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"Identifierhead"];

建立頭視圖的協議方法

//組的頭視圖建立- (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;}

另外說明一下 flowLayout 的使用

flowLayout可以說是collectionView的布局屬性，設定不同 flowLayout ，可以載入出不同的collectionView的布局式樣

iOS：UICollectionView的子類化建立