swift - 如何使用swift将字符串变量转换为数组

Question

我有这个变量

var = "[\"test\", \"test\", \"test\", \"test\", \"test\", \"test\", \"test\", \"test\"]"

如何将其转换为数组

[\"test\", \"test\", \"test\", \"test\", \"test\", \"test\", \"test\", \"test\"]

Answer 1

您的字符串包含 JSON数组的表示字符串元素。您可以将其转换为 Swift [String] 数组使用 JSONSerialization类:

let jsonString = "[\"foo\", \"bar\", \"baz\"]"
print("JSON:", jsonString)

let jsonData = jsonString.data(using: .utf8)! // Conversion to UTF-8 cannot fail.

if let array = (try? JSONSerialization.jsonObject(with: jsonData, options: [])) as? [String] {
    // `array` has type `[String]`.

    // Let's dump the array for demonstration purposes:
    print("\nArray:")
    for (idx, elem) in array.enumerated() {
        print(idx, elem)
    }
} else {
    print("malformed input")
}

输出:

JSON: ["foo", "bar", "baz"]Array:0 foo1 bar2 baz