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我正在使用这个自定义集合视图布局实现。我可以很好地运行该 repo 中的示例，但是当我将其复制CustomCollectionViewLayout.swift到自己的项目中时，Type 'Int' does not conform to protocol 'NSCopying'该方法出现错误

override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? {
    return self.itemAttributes[indexPath.section][indexPath.row] as? UICollectionViewLayoutAttributes
}

哪里var itemAttributes是 NSMutableArray!

该错误是由第二个索引生成的，[indexPath.row]。

有任何想法吗？我尝试将相同的功能放在一个快速的操场上并且没有得到任何错误..

更新！这是一个 swiftstub，其中保存了我的游乐场。它不会执行，因为Import UIKit，但以下原因：

let x = collectionViewLayout.itemAttributes[indexPath.section]
let y = collectionViewLayout.itemAttributes[indexPath.section][indexPath.row]
print( "x's type = \(_stdlib_getDemangledTypeName(x))")
print("x = \(x)")
print( "y's type = \(_stdlib_getDemangledTypeName(y))")
print("y = \(y)")

产量：

x's type = __NSArrayM
x = (
    "<UICollectionViewLayoutAttributes: 0x7fbe6ac041d0> index path: (<NSIndexPath: 0xc000000000000016> {length = 2, path = 0 - 0}); frame = (0 0; 66 30); zIndex = 1024; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ac05030> index path: (<NSIndexPath: 0xc000000000200016> {length = 2, path = 0 - 1}); frame = (65 0; 63 30); zIndex = 1023; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ae1e2a0> index path: (<NSIndexPath: 0xc000000000400016> {length = 2, path = 0 - 2}); frame = (127 0; 65 30); zIndex = 1023; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ac06830> index path: (<NSIndexPath: 0xc000000000600016> {length = 2, path = 0 - 3}); frame = (191 0; 66 30); zIndex = 1023; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ae21e50> index path: (<NSIndexPath: 0xc000000000800016> {length = 2, path = 0 - 4}); frame = (256 0; 67 30); zIndex = 1023; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ad70f30> index path: (<NSIndexPath: 0xc000000000a00016> {length = 2, path = 0 - 5}); frame = (322 0; 66 30); zIndex = 1023; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ac054e0> index path: (<NSIndexPath: 0xc000000000c00016> {length = 2, path = 0 - 6}); frame = (387 0; 66 30); zIndex = 1023; ",
    "<UICollectionViewLayoutAttributes: 0x7fbe6ad72420> index path: (<NSIndexPath: 0xc000000000e00016> {length = 2, path = 0 - 7}); frame = (452 0; 65 30); zIndex = 1023; "
)
y's type = Swift.ImplicitlyUnwrappedOptional<Swift.AnyObject>
y = <UICollectionViewLayoutAttributes: 0x7fbe6ac041d0> index path: (<NSIndexPath: 0xc000000000000016> {length = 2, path = 0 - 0}); frame = (0 0; 66 30); zIndex = 1024;
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1 回答 1

-1

更改override func layoutAttributesForItemAtIndexPath为

override func layoutAttributesForItemAtIndexPath(indexPath: NSIndexPath) -> UICollectionViewLayoutAttributes? { let row = indexPath.row let x : NSMutableArray = self.itemAttributes[indexPath.section] as! NSMutableArray let l = x[row] as? UICollectionViewLayoutAttributes return l }

我将在今天晚些时候分叉 CustomCollectionLayoutView 并制作一个 swift2 副本

于 2015-08-20T10:17:22.403 回答