实例成员'image'不能用于类型 'UIImageView'

Question

var imageView = UIImageView.self
let locationManager = CLLocationManager()
let region = CLBeaconRegion(proximityUUID: UUID(uuidString: "B9407F30-F5F8-466E-AFF9-25556B57FE6D")!, identifier: "Estimotes")
let images = [
    53219:  UIImage(named:"White Glyph 2"),
    59317:  UIImage(named:"White Glyph 3"),
    17068: UIImage(named:"White Glyph 4")
]

func locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) {
    let knownBeacons = beacons.filter{ $0.proximity != CLProximity.unknown }
    if (knownBeacons.count > 0) {
        let closestBeacon = knownBeacons[0] as CLBeacon
        self.imageView.image = self.images[closestBeacon.minor.intValue] // error gets thrown on this line
    }
}

如何修复此错误？这段代码会起作用还是我走错了方向？

Answer 1

实例化一个类，你需要使用初始值设定项。

// var imageView = UIImageView.self
var imageView = UIImageView()
//...
func locationManager(_ manager: CLLocationManager, didRangeBeacons beacons: [CLBeacon], in region: CLBeaconRegion) {
    //...
        //self.imageView.image = self.images[closestBeacon.minor.intValue] 
        self.imageView.image = self.images[closestBeacon.minor.intValue]!
    //...
}

Answer 2

UIImageView.self 是 class Type，UIImageView(( 是初始化 UIImageView。