rootviewcontroller outlet
什么视图可以出现在白色区域
当它跳出来的时候，
and it will embed that MVC's view inside its own view
第一个视图嵌入到导航视图里
顶部的标题栏，还是视图的一部分，，由 navigationview 控制着
它将改变这个视图的边界，以适应
struct and springs 因为当边界被缩小
你要确保东西移动的位置在你要的地方上
比如边缘的位置对不对，，是否拉伸
设计好struct and spring 这样可以有不同的尺
另一个视图就接管了，
这个白色矩形区域
一个叫segue的操作
它的作用是push
把新的MVC
UIImagePickerController media types
avaiableMediaTypeForSourceType
Mobile Core Services framework into your project.
UIVideoEditorController your recorded videos to be edited.
Managing Files
NSUserDefaults class is especial useful for doing quick persistence of light data
it is not nearly s efficient for dealing with large objects, such as video music images
ios file management.
display a table of Hotspots
edit and add to ,
which these objects will be fairly lightweight and thus able to be stord in NSUserDefaults
the file management system for demonstration purposes.
single view application template,following the exact smae process as the previous recipe.
go tyrough and create your Hotspot class
create another view controller to manage the creating and editing of any Hotspot objects by the user.
Declare the Hotspot property
@property (strong, nonatomic) IBOutletHotspot *hotspot;
a classs to be iboutlet
a delegate property to handle the completion of this calss's use
Defined the protocol HotspotInfoDelegate by adding the following code
above the main interface section to the header file
in your HotspotInfoViewontroller's implementation file ,you will add a method
populate the view with a give Hotspot's information.
this object will then be passed back to your deleate property through the
HotspotInfoViewConroller:didReturnHotspot:isNew:
modify your application delegate's implementation file to put your view controller
in a UINavigationController.
Adjust your application:didFinishLaunchingWithOptions
Working with NSCalendar and NSDate
time- and date-based calculations
to - do lists to telling the user how much time remians before an alarm will
go off.
event-based user interface,
NSDate, NSCalendar,NSDateComponents classes by converting dates
from the popular Gregorian calendar to the Hebrew Calendar
is fundamentally the same as a plain style table ,but with
an index running down the right hand edge,
this index displays letters or numbers, which the user can tap to automatically
scroll the table to the relevant section ,
without having to scroll manually.
rely on two elements an array of strings to act as index entries that will
be displaed down the right hand edge, and data that is organized into sections corres
ponding to the index entries.
Using Sectioned and Grouped Tables
Sections take the organized presentation of data one stage funther
and introduce the concept of grouping the rows together, as you
learned in chapter 2.These can be presented either b dividing the
table view by section headers or by splitting the table p into groups.
Spliting the row into distinct groups helps break up the information,
and makes it easy to see the separate groups when scrolling through a long table
The data for each section or group is stored in an inner array.
which in turn is stored in an outer array that organizes all the sections
and groups together.
Creating a Simple Indexed Table
consists of a list of names , one for each letter of the alphabet.
The names are sorted into sections, and there's an index list for navigation.
have only one name,so there's no need to sort the data for each section.
You'll look at sorting the rows in the next section of this chapter.