NSInvalidArgumentException在UserDefault中保存自定义对象数组

尝试Objective-C对象(NSArray、NSDictionary)。
https://developer.apple.com/library/content/documentation/Cocoa/Conceptual/UserDefaults/AccessingPreferenceValues/AccessingPreferenceValues.html#//apple_ref/doc/uid/10000059i-CH3-97383 .

可以保存、获取NSData、NSDate、NSString、NSNumber、NSArray、NSDictionary和NSURL类型的对象。

因此,一种可能的解决方案是:

struct Action { var timestamp: TimeInterval; var winner: String }

var actions: [Action] = []

...
actions.map({ ["time": $0.timestamp, "winner": $0.winner ] as NSDictionary })
// You could also convert the actions manually one by one into NSDictionary
// and append them to an [NSDictionary]



UserDefaults.standard.set(actions as NSArray, forKey: "currentMatch")
UserDefaults.standard.synchronize()

Swift数组和字典可以 桥接的 到 NSArray , NSDictionary 分别地

您还可以使用Codable,它还可以序列化属性列表。