没有'+'候选人产生预期的上下文结果类型'NSNumber？' 斯威夫特3

Question

在Xcode 8和Swift 3上出现错误+我已尝试过任何事情,但没有结果.这里的代码:

static func addNotificationInterval(title: String, body: String,

indentifier: String, interval: Double) {

    let content = UNMutableNotificationContent()
    content.title = NSString.localizedUserNotificationString(forKey: title, arguments: nil)
    content.body = NSString.localizedUserNotificationString(forKey: body, arguments: nil)
    content.sound = UNNotificationSound.default()
    content.badge = UIApplication.shared.applicationIconBadgeNumber + 1; content.categoryIdentifier = "com.elonchan.localNotification"

    let trigger = UNTimeIntervalNotificationTrigger.init(timeInterval: interval, repeats: true)
    let request = UNNotificationRequest.init(identifier: indentifier, content: content, trigger: trigger)
    let center = UNUserNotificationCenter.current()

    center.add(request)

    print("SetNotifiInterval")

}

错误来自+:

content.badge = UIApplication.shared.applicationIconBadgeNumber + 1; content.categoryIdentifier = "com.elonchan.localNotification"

错误类型:

没有'+'候选人产生预期的上下文结果类型'NSNumber？'

Answer 1

查看最新参考UNMutableNotificationContent:

var badge: NSNumber?

要应用于应用程序图标的数字.

在夫特3,许多隐式类型转换,像Int到NSNumber,被去除.您需要在它们之间显式地转换类型.

content.badge = (UIApplication.shared.applicationIconBadgeNumber + 1) as NSNumber; ...