访问元组数组 Swift 4

Question

我正在尝试为自定义 collection 视图单元格的某些组件赋值。该数组与自定义 collection 视图单元位于同一 class 中，但我无法接缝访问该数组。任何意见，将不胜感激。

import UIKit
import CoreLocation
class eventCell: UICollectionViewCell {

    @IBOutlet private weak var eventTitle: UILabel!
    @IBOutlet private weak var descriptionLabel:UILabel!
    @IBOutlet private weak var eventImage: UIImageView!

    var eventArray = [(title:String, location:String, lat:CLLocationDegrees, long:CLLocationDegrees)]()   

    override func prepareForReuse() {
        eventImage.image = nil
    }

    func lool() {
        eventTitle.text = eventArray.title
    }
}

然而，当我尝试添加标题时，我总是收到此错误：

Value of type '[(title: String, location: String, lat: CLLocationDegrees, long: CLLocationDegrees)]' (aka 'Array<(title: String, location: String, lat: Double, long: Double)>') has no member 'title'

任何帮助都将非常有用，在此先感谢！

Answer 1

为什么不创建一些 Struct？像这样简单：

struct Event {
   var title: String
   var location: String
   var lat: CLLocationDegrees
   var long: CLLocationDegrees
}

那就这样吧：

var eventArray = [Event]()

然后这样称呼它：

for event in eventArray{
  event.title = eventTitle.text
}

Answer 2

你应该这样做：

class eventCell: UICollectionViewCell {
    @IBOutlet private weak var eventTitle: UILabel!
    @IBOutlet private weak var descriptionLabel:UILabel!
    @IBOutlet private weak var eventImage: UIImageView!

    typealias Event = (title:String, location:String, lat:CLLocationDegrees, long:CLLocationDegrees)

    var eventArray = [Event]()


    override func prepareForReuse() {
        eventImage.image = nil
    }

    func lool() {
        var event = Event(title: "a", location:"b", lat:5, long:4)
        eventArray.append(event)
        eventTitle.text = eventArray[0].title
    }
}

访问元组数组 Swift 4

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