swift - 无法减去包含两个字典的两个集合

Question

//比较两个数组，得到与第一组相同的结果

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

Answer 1

您可以使用以下代码减去两个集合。尝试一下这个希望对你有帮助。

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)