無法減去含有兩個dictonaries

Question

//比較兩個陣列得到的結果相同的兩組作爲第一設定

let preContactSet = Set(arrayLiteral: tempPreviousContactArray) 
    let currentContactSet = Set(arrayLiteral: tempCurrentContactArray) 
    let subtractSet = currentContactSet.intersect(preContactSet) 
    print(subtractSet) 

Answer 1

可以使用減去以下代碼的兩個組。 試試這個希望它會幫助你。

let test1 : NSArray = NSArray(array: [1, 2, 3, 4, 5, 6]) 
let test2 : NSArray = NSArray(array: [4, 3]) 
let set1 : NSMutableSet = NSMutableSet(array: test1 as [AnyObject]) 
let set2:NSSet = NSSet(array: test2 as [AnyObject]) 
set1.intersectSet(set2 as Set<NSObject>) 
print(set1.allObjects)