在我的项目中使用 Swift 3 转换器后，加载 UICollectionViewController 的子类时我不断崩溃。下面是我的代码以及集合视图的相关方法。
override func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return photos.count
}
override func collectionView(_ collectionView: UICollectionView, c`enter code here`ellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: tileReuseIdentifier, for: indexPath) as! TileCollectionViewCell
cell.captionLabel.text = photos[(indexPath as NSIndexPath).item].caption
cell.captionLabel.adjustsFontSizeToFitWidth = true
cell.imageView.image = photos[(indexPath as NSIndexPath).item].image
cell.layer.cornerRadius = 10
cell.layer.shadowPath = UIBezierPath(roundedRect: cell.frame, cornerRadius: cell.layer.cornerRadius).cgPath
return cell
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAtIndexPath indexPath: IndexPath) -> CGSize {
return CGSize(width: cellSize, height: cellSize)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, minimumInteritemSpacingForSectionAtIndex indexPath: IndexPath) -> CGFloat {
return spacing
}
override func collectionView(_ collectionView: UICollectionView, viewForSupplementaryElementOfKind kind: String, at indexPath: IndexPath) -> UICollectionReusableView {
let reusableView = collectionView.dequeueReusableSupplementaryView(ofKind: kind, withReuseIdentifier: headerReuseIdentifier, for: indexPath) as! HeaderCollectionReusableView
reusableView.setupView()
return reusableView
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, referenceSizeForHeaderInSection section: Int) -> CGSize {
return CGSize(width: collectionView.frame.width, height: cellSize-20)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAtIndex section: Int) -> UIEdgeInsets {
return UIEdgeInsetsMake(topMargin, spacing, bottomMargin, spacing)
}
这是崩溃时的堆栈跟踪：
libswiftFoundation.dylib`static Foundation.IndexPath._unconditionallyBridgeFromObjectiveC (Swift.Optional<__ObjC.NSIndexPath>) -> Foundation.IndexPath:
0x100a549e0 <+0>: stp x20, x19, [sp, #-32]!
0x100a549e4 <+4>: stp x29, x30, [sp, #16]
0x100a549e8 <+8>: add x29, sp, #16 ; =16
0x100a549ec <+12>: mov x19, x0
0x100a549f0 <+16>: cbz x19, 0x100a54a18 ; <+56>
0x100a549f4 <+20>: mov x0, x19
0x100a549f8 <+24>: bl 0x100a7cfd4 ; function signature specialization <Arg[0] = Owned To Guaranteed, Arg[1] = Dead> of Foundation.IndexPath.init (nsIndexPath : __ObjC.NSIndexPath) -> Foundation.IndexPath
0x100a549fc <+28>: mov x20, x0
0x100a54a00 <+32>: mov x0, x19
0x100a54a04 <+36>: bl 0x100abcfe4 ; symbol stub for: objc_release
0x100a54a08 <+40>: mov x0, x20
0x100a54a0c <+44>: ldp x29, x30, [sp, #16]
0x100a54a10 <+48>: ldp x20, x19, [sp], #32
0x100a54a14 <+52>: ret
-> 0x100a54a18 <+56>: brk #0x1
一些搜索让我发现https://bugs.swift.org/browse/SR-2103 https://bugs.swift.org/browse/SR-2103 and https://bugs.swift.org/browse/SR-2417 https://bugs.swift.org/browse/SR-2417
奇怪的是，当我在上述方法的开头设置断点时，应用程序在到达任何断点之前崩溃。viewDidLoad执行并返回。然后应用程序崩溃并出现上述错误。
有人可以帮忙吗？
