UICollectionView中的多个部分 [英] Multiple Section in UICollectionView

问题描述

我正在使用收集视图为我的医院构建一个iOS应用.但是，根据目的，我需要为专科诊所使用多个部分.如果仅用于1个部分，我已经完成了代码.当我尝试将其分为2部分时，它总是返回nil值.

I was building an iOS app for my hospital using collection view. However, I need to use multiple sections for the specialist clinic depends on the purpose. I already completed the code if it's just for 1 section. when I try to make it 2 sections, it always returns a nil value.

请在下面检查我的代码

public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell", for: indexPath)

    if indexPath.section == 0 {
        var buttonSpecialist = cell.viewWithTag(1) as! UIButton

        buttonSpecialist.setTitle(list[indexPath.row].SpecialtyName, for: .normal)

        let btnimg = try? UIImage(data: Data(contentsOf: URL(string: list[indexPath.row].ImageUrl)!))

        var newimg = imageResize(image: btnimg as! UIImage, scaledTo: CGSize(width: 50, height: 50))

        buttonSpecialist.setImage(newimg, for: .normal)
        buttonSpecialist.contentMode = .center
        buttonSpecialist.imageView?.contentMode = .scaleAspectFit

        //let sign: Int = imageOnTop ? 1 : -1
        let imageSize: CGSize? = buttonSpecialist.imageView?.frame.size
        buttonSpecialist.titleEdgeInsets = UIEdgeInsetsMake(((imageSize?.height)! + 5) * 1, -(imageSize?.width)!, 0, 0)
        let titleSize: CGSize? = buttonSpecialist.titleLabel?.bounds.size
        buttonSpecialist.imageEdgeInsets = UIEdgeInsetsMake(-((titleSize?.height)! + 5) * 1, 0, 0, -(titleSize?.width)!)

        cell.layer.borderWidth = 1.0
        cell.layer.borderColor = UIColor.black.cgColor
    }
    else if indexPath.section == 1 {
        var buttonSpecialist = cell.viewWithTag(1) as! UIButton

        buttonSpecialist.setTitle(list2[indexPath.row].SpecialtyName, for: .normal)

        let btnimg = try? UIImage(data: Data(contentsOf: URL(string: list2[indexPath.row].ImageUrl)!))

        var newimg = imageResize(image: btnimg as! UIImage, scaledTo: CGSize(width: 50, height: 50))

        buttonSpecialist.setImage(newimg, for: .normal)
        buttonSpecialist.contentMode = .center
        buttonSpecialist.imageView?.contentMode = .scaleAspectFit

        //let sign: Int = imageOnTop ? 1 : -1
        let imageSize: CGSize? = buttonSpecialist.imageView?.frame.size
        buttonSpecialist.titleEdgeInsets = UIEdgeInsetsMake(((imageSize?.height)! + 5) * 1, -(imageSize?.width)!, 0, 0)
        let titleSize: CGSize? = buttonSpecialist.titleLabel?.bounds.size
        buttonSpecialist.imageEdgeInsets = UIEdgeInsetsMake(-((titleSize?.height)! + 5) * 1, 0, 0, -(titleSize?.width)!)

        cell.layer.borderWidth = 1.0
        cell.layer.borderColor = UIColor.black.cgColor
    }

这里的主要问题是，我不知道如何为特定部分设置特定单元格.我已经在'cellforindexpath'函数中使用了'IF'，但是没有用.

The main problem here is, I didn't know how to set the specific cell for the specific section. I already using 'IF' inside the function 'cellforindexpath', but it didn't worked.

这是我在

func numberOfSections(in collectionView: UICollectionView) -> Int {
    // #warning Incomplete implementation, return the number of sections
    return 2
}


func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
    // #warning Incomplete implementation, return the number of items

    if section == 0 {
        return list.count
    }
        else if section == 1{
            return list2.count
        }

    return 0

}

请帮助我

推荐答案

确保分配数据源&委托给CollectionView

Make sure assigning DataSource & Delegate to CollectionView

1.使用以下方法给出要显示的部分数量

1.Give number of sections you wanna show using below method

func numberOfSections(in collectionView: UICollectionView) -> Int {
    return 2
}

2.使用以下方法为CollectionView设置每个部分的项目计数.

2.Set item count of each sections for CollectionView using below method.

func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
   return (section == 0) ? list.count : list2.count
}

3.将每个项目的单元格分配给CollectionView.

3.Assigning cell for each item to CollectionView.

public func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {

    //If you are using multiple cells based on section make condition 

     if indexPath.section == 0 {
             //make sure the identifier of your cell for first section
             let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell1", for: indexPath)
            // do your stuffs
             return cell
     }else{
             //make sure the identifier of your cell for second section
             let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "cell2", for: indexPath)
            // do your stuffs
             return cell
      }

}

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