这是我做一个iOS版本运维App的时候写的代码，记录一下：

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let resolveDict = [
    "systemName": UIDevice.current.systemName,
    "systemVersion": UIDevice.current.systemVersion,
    "identifierForVendor": UIDevice.current.identifierForVendor?.description ?? "",
    "model": UIDevice.current.model,
    "localizedModel": UIDevice.current.localizedModel
    ]
do {
    let json = try JSONSerialization.data(withJSONObject: resolveDict, options: []);
    let jsonStr = String(data: json, encoding: .utf8);
    resovler(jsonStr);
} catch {
    rejecter("Get AppInfo error", error.localizedDescription, nil);
}