1
我有一个3个部分的collectionView和一个标题上的按钮来删除每个部分。我写了我的代码，但我一直得到这个错误：删除按钮无法正常工作，收集查看
fatal error: Index out of range (lldb)
但我不知道发生了什么事？为什么它不工作。
这是我的代码：
//Global Identifier
private let cellIdentifier = "ImageCell"
private let headerIdentifier = "Header"
class ViewController: UICollectionViewController {
//Data Models
//Image Arrays
var fireImages: [UIImage] = [
UIImage(named: "charizard")!,
UIImage(named: "ninetails")!,
UIImage(named: "arcanine")!,
UIImage(named: "rapidash")!,
UIImage(named: "magmar")!,
UIImage(named: "flareon")!
]
var waterImages: [UIImage] = [
UIImage(named: "blastoise")!,
UIImage(named: "golduck")!,
UIImage(named: "cloyster")!,
UIImage(named: "goldeen")!,
UIImage(named: "magikarp")!,
UIImage(named: "vaporeon")!
]
var electricImages: [UIImage] = [
UIImage(named: "pikachu")!,
UIImage(named: "magneton")!,
UIImage(named: "zapdos")!,
UIImage(named: "electabuzz")!,
UIImage(named: "raichu")!,
UIImage(named: "jolteon")!
]
//Name Arrays
var fireNames = ["Charizard", "Ninetales", "Arcanine", "Rapidash", "Magmar", "Flareon"]
var waterNames = ["Blastoise", "Golduck", "Cloyster", "Goldeen", "Magikarp", "Vaporeon"]
var electricNames = ["Pikachu", "Magneton", "Zapdos", "Electrabuzz", "Raichu", "Jolteon"]
//Sections
var sectionTitle = ["Fire Types", "Water Types", "Electric Types"]
//--------------------------------
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
//--------------------------------
//MARK: - UICollectionViewDataSource
//Number of Sections
override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return sectionTitle.count
}
//Number of Cells in each Section
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
//How can I dynamically code this area?
return 6
}
//Header Configuration
override func collectionView(collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, atIndexPath indexPath: NSIndexPath) -> UICollectionReusableView {
if indexPath.section == 0 {
//Fire Type header
let header = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: headerIdentifier, forIndexPath: indexPath) as! CollectionReusableView
header.headerTitle.text = sectionTitle[indexPath.section]
header.backgroundColor = UIColor.orangeColor()
header.deleteButton.tag = indexPath.section
return header
} else if indexPath.section == 1 {
//Water Type header
let header = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: headerIdentifier, forIndexPath: indexPath) as! CollectionReusableView
header.headerTitle.text = sectionTitle[indexPath.section]
header.backgroundColor = UIColor.cyanColor()
header.deleteButton.tag = indexPath.section
return header
} else {
//Electric Type header
let header = collectionView.dequeueReusableSupplementaryViewOfKind(UICollectionElementKindSectionHeader, withReuseIdentifier: headerIdentifier, forIndexPath: indexPath) as! CollectionReusableView
header.headerTitle.text = sectionTitle[indexPath.section]
header.backgroundColor = UIColor.yellowColor()
header.deleteButton.tag = indexPath.section
return header
}
}
//Cell Configuration
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
if indexPath.section == 0 {
//Fire Type cells
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(cellIdentifier, forIndexPath: indexPath) as! CollectionViewCell
cell.pokemonImage.image = fireImages[indexPath.row]
cell.pokemonLabel.text = fireNames[indexPath.row]
return cell
} else if indexPath.section == 1 {
//Water Type cells
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(cellIdentifier, forIndexPath: indexPath) as! CollectionViewCell
cell.pokemonImage.image = waterImages[indexPath.row]
cell.pokemonLabel.text = waterNames[indexPath.row]
return cell
} else {
//Electric Type cells
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(cellIdentifier, forIndexPath: indexPath) as! CollectionViewCell
cell.pokemonImage.image = electricImages[indexPath.row]
cell.pokemonLabel.text = electricNames[indexPath.row]
return cell
}
}
//Delete Section Button
@IBAction func deleteSectionButton(sender: UIButton) {
//Section tag
let section = sender.tag
if section == 0 {
//Update data model
fireImages.removeAtIndex(section)
fireNames.removeAtIndex(section)
sectionTitle.removeAtIndex(section)
//Action
collectionView?.performBatchUpdates({
self.collectionView?.deleteSections(NSIndexSet(index: section))
},
completion: { (finished) in
if finished {
self.collectionView!.reloadData()
}
})
} else if section == 1 {
//Update data model
waterImages.removeAtIndex(section)
waterNames.removeAtIndex(section)
sectionTitle.removeAtIndex(section)
//Action
collectionView?.performBatchUpdates({
self.collectionView?.deleteSections(NSIndexSet(index: section))
},
completion: { (finished) in
if finished {
self.collectionView!.reloadData()
}
})
} else {
//Update data model
electricImages.removeAtIndex(section)
electricNames.removeAtIndex(section)
sectionTitle.removeAtIndex(section)
//Action
collectionView?.performBatchUpdates({
self.collectionView?.deleteSections(NSIndexSet(index: section))
},
completion: { (finished) in
if finished {
self.collectionView!.reloadData()
}
})
}
}
}
它也向我展示这一点。所有的
我对集合视图了解不多，但是看起来您已经将3个部分硬编码到每个collectionView中，即使您已经删除了一个集合视图。 – Shades
如何动态编码我的'numberOfItemsInSection'覆盖？它现在说6 6 – art3mis
我想你想改变numberOfSectionsInCollectionView。而不是3，请使用sectionTitle.count，当您删除某个节时，请从数组中删除其标题。当然，因为我自己从来没有用过它，所以我可以走了。 – Shades