解析和Swift 1.2问题

解析和Swift 1.2问题

现在，使用Swift 1.2时，您应该更加谨慎地展开可选项。因此，在具有

PFObject

和的闭包中

NSError

，删除感叹号或添加问号使其成为可选。

然后，更安全地解开对象。尝试如下：

// You can create this in a separate file where you save your modelsstruct myUser {    let name: String?    let age: Int?}// Now this in the view controller@IBAction func load_click(sender: AnyObject) {    var query = PFQuery(className: "myClass")    query.getObjectInBackgroundWithId("MPSVivtvJR", block: {        (object:PFObject!, error: NSError?) -> Void in        if let thisName = object["name"] as? String{ if let thisAge = object["age"] as? Int{     let user = myUser(name: thisName, age: thisAge)     println(user) }        }    })}