convenience init 只作为补充和提供使用上的方便。并且convenience init 不能被子类重写或者被子类super形式调用
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
convenience init 只作为补充和提供使用上的方便。并且convenience init 不能被子类重写或者被子类super形式调用
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}