如何在Swift中将嵌套字典插入到字典中

// 定义嵌套字典
var nestedDict: [String: Any] = [
    "nestedKey1": "nestedValue1",
    "nestedKey2": 123
]

// 定义主字典
var mainDict: [String: Any] = [
    "mainKey1": "mainValue1",
    "mainKey2": 456
]

// 将嵌套字典插入到主字典中
mainDict["nestedDictKey"] = nestedDict

// 打印主字典以验证结果
print(mainDict)

["mainKey1": "mainValue1", "mainKey2": 456, "nestedDictKey": ["nestedKey1": "nestedValue1", "nestedKey2": 123]]

if let existingValue = mainDict["nestedDictKey"] {
    // 处理键冲突的情况
    print("Key already exists with value: \(existingValue)")
} else {
    mainDict["nestedDictKey"] = nestedDict
}