#selector(xiuGaiNote(_:))    @objcfuncxiuGaiNote(_note:Notification)->Void{    letdic=note.userInfo  &nbs...

//  funccanBecomeFirstResponder()->Bool{//    returntrue//  }  overridevarcanBecomeFirstResponder:Bool{&nbs...

 、、   [UIApplicationsharedApplication].networkActivityIndicatorVisible=YES; 、、Set(）union(）...

     letnow=Date()    letgregorian=Calendar.init(identifier:Calendar.Identifier.gregorian)    l...

swift开发笔记15//swift中的String和OC中的NSString转换extensionString{ varconvert:NSString{return(selfasNSString)}}    varbackgroundColor:UIColor=UI...

dotOne.transform=CGAffineTransform.init(scaleX:0.01,y:0.01) // OptionSet，可以多选，例如[.repeat,.autoreverse]UIView.animate(withDuration:0.6,delay:0.0,option...

letv:String!=str　　　　//疑问，后面加!，什么意思？表示这个常量一定有值https://www.zhihu.com/question/36448325语法糖funcdoSomething(str:String?){ifletv=str{//usevtodosomething}} funcdo...

//注意判断条件， overridefuncprepare(forsegue:UIStoryboardSegue,sender:Any?){   ifletcell=senderas?UICollectionViewCell,   letindexP...

//自定义cellclassCell:UITableViewCell{     @IBOutletweakvarfenLei:UILabel!  @IBOutletweakvartangGuoMing:UILabel!  &nbs...

//cell的经典配置   varmodel:Interest!{    didSet{      updateUI()    } &nbs...

//类的扩展publicextensionUIColor{  convenienceinit(r:Int,g:Int,b:Int,a:CGFloat){    self.init(red:CGFloat(r)/255,green:CGFloat(g)/255,...

//监听通知NotificationCenter.default.addObserver(self,selector:#selector(LibraryAPI.downloadImage(_:)),name:NSNotification.Name(rawValue:downloadImageNotification),...

 swift中的XML解析，工具类：FeedParser() //在主线程刷新UIDispatchQueue.main.async{} //tableView自动布局tableView.beginUpdates()tableView.endUpdates() //guardgua...

rowHeightNotethatifyoucreateaself-sizingcellinInterfaceBuilder,thedefaultrowheightischangedtothevaluesetinInterfaceBuilder.Togettheexpectedself-sizingbehaviorfo...

亲测成功。随便新建一个swift文件，xcode问是否生成xxx-Bridging-Header.h文件，点YES。再编译，问题解决。 Bydefault,thegeneratedheadercontainsinterfacesforSwiftdeclarationsmarkedwiththe pu...