swift2.2 - 'contains()' 不可用：调用序列上的 'contains()' 方法

Question

如何“在序列上调用 'contains()' 方法？”

 func deleteSelfieObjectFromList(selfieImgObject: SelfieImage) {
    if contains(self.dataArray, selfieImgObject) {
       removeObject(&self.dataArray, object: selfieImgObject)
       self.collectionView?.reloadData()
    }
  }

Answer 1

像这样：

let arr = [42]
if arr.contains(42) {
    print("found")
}