斯坦福Developing iOS 8 Apps学习笔记（六）

UITextField

一些基本属性

• becomeFirstResponder
• resignFirstResponder
• Return Key被按下时func textFieldShouldReturn(sender:UITextField) -> Bool一般需要sender.resignFirstResponder
• textField resin firstResponder时func textFieldDidEndEditing(sender:UITextField)
• clearOnBeginEditing:Bool
• adjustsFontSizeToFitWidth
• minimumFontSize（一般如果使用上面一个，则要设置这个）
• placeholder
• background/disabledBackground
• defaultTextAttributes //apply to entire text
• **UITextField在左右各有一个overlays，you can control in detail the layout of the text field(border, left/right view, clear button)
• var inputAccessoryView:UIView //UITextField method，加强键盘，能够在键盘上方创建一个view

对于输入的一些设置

由UITextField遵守UITextInputTraitsPropotocol
- var UITextAutoCapitalizationType // words,sentences,etc.
- var UITextAutoCorrectionType // yes or no
- var UIReturnKeyType // Go,Search,Google,Done…
- var Bool secureTextEntry
- var UIKeyboardType //ASCII,URL,PhonePad,etc.

键盘输入的可以监听的时事件

• UIKeyboard{will,did}{show,hide}Notifications sent by UIWindow
• 监听方法：
• NSNotificationCenter.defaultCenter().addObserver(self, selector:"theKeyboardAppeared:", name:UIKeyboardDidShowNotification, object:view.window)
• notification.userInfo have the details about appearance
• 一般需要在此时控制使要输入的目标能够显示在键盘的上方
• UITableViewController listens for this and scrolls automatically

Table View

一些基本属性

• var tableHeaderView:UIView
• var tableFooterView:UIView

UITableViewDataSource

• 
  
• tableView(UITableView, titleForHeaderInSection:Int)
• tableView(UITableView, titleForFooterInSection:Int)
• tableView(UITableView, cellForRowAtIndexPath:NSIndexPath)
  

dataSource主要是显示什么，Delegate主要是怎么显示

UITableViewDelegate

• tableView didselectRowAtIndexPath
• tableView accessoryButtonTappedForRowWithIndexPath
• will/did Select
• view For Header/Footer
• will begin/did end notifications for editing

tableView

• readloadData()
• reloadRowsAtIndexPaths

height of rows

• Row height can be fixed (rowHeight:CGFloat)
• rowHeight = UITableViewAutomaticDimension // uses AutoLayout
• help tableView by setting estimatedRowHeight
• tableView heightForRowAtIndexPath -> CGFloat //这个会被调用a lot
• tableView estimatedHeightForRowAtIndexPath -> CGFloat

tableView.estimatedRowHeight = tableView.rowHeight
tableView.rowHeight = UITableViewAutomaticDimension