var dictStudents:[Int:String] = [:]
dictStudents[2020967021] = "薛传勇"
dictStudents[2020967015] = "徐杨"
dictStudents[2020967007] = "王金玉"
dictStudents[2020967018] = "刘辉"
dictStudents[2020967017] = "邹徐陈"
print(dictStudents)
var arrayNumbers = [Int](dictStudents.keys)
print(arrayNumbers)
arrayNumbers.shuffle()
for i in arrayNumbers{
if let temp = dictStudents[i]{
print(i,temp)
}
}