遍历
let array : [String] = ["111","222","333"]
一:获取下标值
for index in 0..<array.count {
print("index")
}
结果:
0
1
2
二:获取元素
for item in array {
print("item")
}
结果:
111
222
333
三:获取下标+元素
for (index, item) in array.enumerated() {
print("index,item")
}
结果:
0,111
1,222
2,333
合并
注意:
相同元素类型的数组才能合并,不同元素类型的不能相加合并。
let array1 = ["111","222","333"]
let array2 = ["444","555","666"]
let array3 = array1 + array2
print(array3)
结果:
["111", "222", "333", "444", "555", "666"]
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