預計「」分隔符和未解決的標識符

Question

我已經看過了這些錯誤了一天的解決方案，現在，我不知道如何解決這些問題。下面的代碼接收多個錯誤消息：

使用在線路未解決標識符NSCalendarUnitDay

的：

localNotification.repeatInterval = NSCalendarUnitDay 

和三個錯誤：

• 預期」， '分隔符
• 使用未解決的識別符 'sharedApplication'
• 使用未解決的識別符的 'applicationBadgeNumber'

在行：

localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1; 

這是整個代碼：

override func viewDidLoad() { 
    super.viewDidLoad() 


    var localNotification:UILocalNotification = UILocalNotification() 
    localNotification.fireDate = datePicker.date 
    localNotification.alertBody = nil; 
    localNotification.alertAction = nil; 
    localNotification.repeatInterval = NSCalendarUnitDay 

    //Add one to the icon badge number 

    localNotification.applicationIconBadgeNumber = [[UIApplication sharedApplication] applicationIconBadgeNumber] + 1; 


    UIApplication.sharedApplication().scheduleLocalNotification(localNotification) 

Answer 1

這是非常基本的。您可以將代碼更改爲：

override func viewDidLoad() { 
    super.viewDidLoad() 

    var localNotification:UILocalNotification = UILocalNotification() 
    localNotification.fireDate = datePicker.date 
    localNotification.alertBody = nil; 
    localNotification.alertAction = nil; 
    localNotification.repeatInterval = NSCalendarUnit.Day 

    //Add one to the icon badge number 

    localNotification.applicationIconBadgeNumber = UIApplication.sharedApplication().applicationIconBadgeNumber + 1; 


    UIApplication.sharedApplication().scheduleLocalNotification(localNotification) 

} 

Answer 2

發生這種情況是因爲您嘗試在Swift中執行Objective-C代碼。

只需更換該行以

localNotification.applicationIconBadgeNumber = UIApplication.sharedApplication().applicationIconBadgeNumber + 1 

當你看到這樣的事情[ClassName classMethod]或本*variable或類似的東西它是Objective-C的。而[]意味着你發送消息給對象。在斯威夫特只需調用方法與()：ClassName.classMethod()