iOS 8 Swift阅读清单

本文介绍了iOS 8 Swift阅读清单的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我想从plist文件中读取整数形式的值.我有以下代码:

I want to read values from a plist file as integers. I have the following code:

let path = NSBundle.mainBundle().pathForResource("savedState", ofType: "plist") let dict = NSDictionary(contentsOfFile: path!) let players: AnyObject = String(dict.valueForKey("players") as NSString) let level: AnyObject = String(dict.valueForKey("level") as NSString) let numPlayers = Int(players as NSNumber) let playLevel = Int(level as NSNumber)

让玩家:和让等级:使我的应用崩溃.我知道这应该很简单-我只是不知道该怎么做.

The let players: and let level: crash my app. I know this should be simple - I just can't figure out how to do it.

推荐答案

您可能正在寻找这样的东西:

You may be looking for something like this:

let path = NSBundle.mainBundle().pathForResource("savedState", ofType: "plist") let dict = NSDictionary(contentsOfFile: path!) let players = dict.valueForKey("players") as? String let level = dict.valueForKey("level") as? String let numPlayers = players != nil ? players!.toInt() : 0 let playLevel = level != nil ? level!.toInt() : 0

它将尝试从plist中读取播放器和关卡作为可选字符串，然后将其设置为Int值，如果它们不为nil，则将numPlayers和playLevel设置为Int值.如果它们是nil，则numPlayers并将playLevel设置为0.尽管如果您的plist值为整数，为什么不将它们读为Ints?

It attempts to read players and level from the plist as optional strings, then if they are non nil it sets numPlayers and playLevel to their Int value. If they are nil numPlayers and playLevel are set to 0. Although if your plist values are integers, why not just read them as Ints?

let players = dict.valueForKey("players") as? Int let level = dict.valueForKey("level") as? Int