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  • Using Indexed Tables

    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.

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  • 原文地址:https://www.cnblogs.com/yushunwu/p/2764048.html
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