我正在尝试在swift中重新编写一个应用程序,该应用程序目前在Objective-C中。我如何将这一行更改为Swift,因为我当前的尝试不能证明是正确的
Tabata *tabata = [notification object];
以下是整个功能:
- (void)stateChanged:(NSNotification*)notification
{
if (enabled)
{
Tabata *tabata = [notification object];
switch (tabata.getState) {
case EXERCISE:
case RELAXATION:
[player play];
break;
default:
break;
}
}
}
以下是我转换成Swift的内容:
func stateChanged(notifcation: NSNotification) {
if enabled {
var tabata: Tabata! = notification.object //error "Use of unresolved identifier 'notification'"
switch tabata.getState() {
case .EXERCISE: fallthrough
case .RELAXATION:
player.play()
break
default:
break
}
}
}
答案 0 :(得分:0)
在Swift中,你必须向下转换AnyObject类型的对象,而不是声明类型
var tabata = notification.object as! Tabata
答案 1 :(得分:0)
func stateChanged(notification: NSNotification) {
if(enabled) {
var tabata: Tabata = notification.object as! Tabata
switch tabata.getState() {
case .EXERCISE:
fallthrough
case .RELAXATION:
player.play()
break
default:
break
}
}
}
希望这有帮助!