swift字符串,数组,字典和集合的遍历

最新推荐文章于 2021-01-13 18:13:29 发布

Beixiqi

最新推荐文章于 2021-01-13 18:13:29 发布

阅读量792

点赞数

CC 4.0 BY-SA版权

文章标签： swift string array set dictionary

本文链接：https://blog.youkuaiyun.com/Beixiqi/article/details/78319207

本文介绍了使用Swift语言对字符串、数组、集合及字典进行遍历的方法。通过具体示例展示了不同数据结构的遍历技巧，包括使用for循环、索引访问以及sorted和enumerated等方法。

摘要生成于 C知道，由 DeepSeek-R1 满血版支持，前往体验 >

//字符串的遍历
print("字符串遍历")
var str = "China"
for item in str.characters {
    print(item)
}
print("+++++++++++++++++++")
for item in str.characters.indices {
    print(str[item])
}
print("+++++++++++++++++++")
var i = 0
while i < str.characters.count {
    var index = str.index(str.startIndex, offsetBy: i)
    print(str[index])
    i += 1
}

//数组的遍历
print("数组遍历")
var arr = [23,1,45,6,78]

for item in arr {
    print(item)
}
print("+++++++++++++++++++")
for (index,value) in arr.enumerated() {
    print(index,value)
}
print("+++++++++++++++++++")
var j = 0
while j < arr.count {
    print(j,arr[j])
    j += 1
}

//集合遍历
print("集合遍历")
var set:Set<String> = []
set = ["china","beijing","朝阳"]

for item in set {
    print(item)
}
print("+++++++++++++++++++")
for ( i,item) in set.sorted().enumerated() {
    print(i,item)
}
//字典遍历
print("字典遍历")
var dic = [1001:"C",1002:"OC",1003:"Java"]
dic[1005] = "C++"

for item in dic {
    print(item)
}
print("+++++++++++++++++++")
for item in dic.keys {
    print(item,dic[item]!)
}
print("+++++++++++++++++++")
for item in dic.values {
    print(item)
}