Question

我有一些VC都是从BaseVC继承的：UIViewController。一些VC嵌入了tableView / collection视图，我正在创建一个函数，允许所有VC在表/集合/ UIView的中心创建一个活动指示器，其函数调用如

activityIndicatorBegin(mytableView)
activityIndicatorBegin(myCollectionView)
activityIndicatorBegin(nil)

以下是我的尝试，我得到的错误是一个奇怪的“未定义的架构x86_64符号”。所以我想这不是正确的方法

var activityIndicator: UIActivityIndicatorView = UIActivityIndicatorView()

func activityIndicatorBegin(scrollView: UIScrollView?) {
    if activityIndicator.isAnimating() == false {
        activityIndicator = UIActivityIndicatorView(frame: CGRectMake(0,0,20,20))
        activityIndicator.center.x = view.center.x
        activityIndicator.center.y = view.center.y - 100
        activityIndicator.hidesWhenStopped = true
        activityIndicator.activityIndicatorViewStyle = UIActivityIndicatorViewStyle.WhiteLarge
        activityIndicator.color = UIColor.blackColor()

        if let scrollView = scrollView {
            scrollView.addSubview(activityIndicator)
        } else {
            view.addSubview(activityIndicator)
        }
        activityIndicator.startAnimating()
    }
}

func activityIndicatorEnd() {
    if activityIndicator.isAnimating() == true {
        activityIndicator.stopAnimating()
        activityIndicator.removeFromSuperview()
    }
}

错误

Undefined symbols for architecture x86_64:
  "myAPP.BaseViewController.activityIndicatorBegin (__ObjC.UITableView?) -> ()", referenced from:
  _OBJC_CLASS_$__TtC7myAPP9VC1 in VC1.o
  _OBJC_CLASS_$__TtC7myAPP14VC2 in VC2.o
  _OBJC_CLASS_$__TtC7myAPPVC3 in VC3.o
  _OBJC_CLASS_$__TtC7myAPP10VC4 in VC4.o
  _OBJC_CLASS_$__TtC7myAPP10VC5 in VC5.o
  _OBJC_CLASS_$__TtC7myAPP9VC6 in VC6.o
  _OBJC_CLASS_$__TtC7myAPP6VC7 in VC7.o

注意我有多个VC正在调用此函数。一些是TableView，一些是标准的UIViewcontroller，一些是CollectionView

在滚动视图和tableview的中心创建活动指示器的功能

0 个答案: