循环思想导致 FBRequestConnection Swift答案

【问题标题】：looping thought results in FBRequestConnection Swift循环思想导致 FBRequestConnection Swift
【发布时间】：2015-03-23 20:38:06
【问题描述】：

我已经对 eventName 进行了硬编码，并将它附加到我的 eventNameArray 中，这样我就可以将它分配给我的表格视图中的 UILabel。这很好用。

func fetchInfo() {


    FBRequestConnection.startWithGraphPath("FBpage/events?fields=name,is_date_only,cover,description", completionHandler: {(connection: FBRequestConnection!, result: AnyObject!, error: NSError!) ->
    Void in

            var eventData = result["data"] as [NSDictionary]
            var getEvent = eventData[0]
            var eventName = getEvent.objectForKey("name") as String
            self.eventNameArray.append(eventName)

            self.tableView.reloadData()


    }
 as FBRequestHandler)


    }//end of fetchfunc

但实际上 eventData 中有不止一个字典（看起来更像这样，但一遍又一遍地多达 10 多个事件）

cover =     {
    "cover_id" = 111;
    id = 11;
    "offset_x" = 0;
    "offset_y" = 0;
    source = "https://scontent.xx.fbcdn.net/hphotos-xfp1/v/t1.0-    9/s720x720/1484689_43320_n.jpg?";
    };
description = "Description for 1st event";
id = 111;
"is_date_only" = 0;
name = "First Event";
"start_time" = "2015-04-11T21:00:00+0800";
}, {
cover =     {
    "cover_id" = 222;
    id = 222;
    "offset_x" = 0;
    "offset_y" = 63;
    source = "https://fbcd-xpa1/t3242_431.png";
};
description = "Description for 2nd event";
id = 22222;
"is_date_only" = 0;
name = "Second Event";
"start_time" = "2015-04-10T21:00:00+0800";
}

我将如何循环，以便我可以获取所有 objectForKey("name") 并将其附加到我的 eventNameArray 而不是硬编码。我明白我现在遇到了什么，只是不知道如何重构它，以便我可以抓住一切

谢谢！

【问题讨论】：

标签： arrays loops swift dictionary

【解决方案1】：

有一个循环：

var eventNames: [String] = []

for event in events as [[NSObject:AnyObject]] {
    let eventName = event["name"] as String
    eventNames.append(eventName)
}

或者像使用闭包一样快速：

let eventNames = (events as [[NSObject:AnyObject]]).map({$0["name"] as? String})

请记住，我假设每个事件都有一个名称

如果你想确保你产生了你需要的崩溃，你可以先检查它的值是否存在。循环：

var eventNames: [String] = []

for event in events as [[NSObject:AnyObject]] {
    if let eventName = event["name"] as? String {
        eventNames.append(eventName)
    }
}

关闭：

let eventNames = (events as [[NSObject:AnyObject]]).map({$0["name"] as? String})

【讨论】：