FooBar下面的类必须覆盖==该Equatable类型的功能.
但是,调用对象contains数组FooBar不会导致==调用自定义函数内的断点.是否可能其他==功能覆盖此自定义功能?
注意:因为FooBar必须从NSCoding和NSObject继承,所以FooBar不会将Equatable列为协议,因为它会导致此错误:
'FooBar'与协议'Equatable'的冗余一致性
func ==(lhs: FooBar, rhs: FooBar) -> Bool {
return lhs.id == rhs.id
}
class FooBar: NSObject, NSCoding {
// Class def
}
// Both serverFooBars and gFooBars are [FooBar]
let newFooBars = serverFooBars.filter { !gFooBars.contains($0) }
Run Code Online (Sandbox Code Playgroud) 我正在关注这个(http://www.raywenderlich.com/78550/beginning-ios-collection-views-swift-part-1)教程,现在我
收到此错误:
'FlickrPhotosViewController'与协议'UICollectionViewDataSource'的冗余一致性
所以我在这里有这个代码:
extension FlickrPhotosViewController : UICollectionViewDataSource {
//1
override func numberOfSectionsInCollectionView(collectionView: UICollectionView) -> Int {
return searches.count
}
//2
override func collectionView(collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return searches[section].searchResults.count
}
//3
override func collectionView(collectionView: UICollectionView, cellForItemAtIndexPath indexPath: NSIndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCellWithReuseIdentifier(reuseIdentifier, forIndexPath: indexPath)
cell.backgroundColor = UIColor.blackColor()
// Configure the cell
return cell
Run Code Online (Sandbox Code Playgroud)
那么这个错误意味着什么?
任何帮助,将不胜感激.