tableView

把新的mvc推送到屏幕上

另一个则滑出

它仍然存在， 左侧的MVC还在

只是不在屏幕上而忆， 另外一个mvc 

那有个小按钮

后退按钮

导航控制器

就会将其撤消

返回有一个强指针指向

管理好内存

不希望保存这个图

你可以重新创建它

只要再点，就会重新创建这个MVC

UITabBarController

Another "controller of controllers"

Mostly set up with ctrl-drag jus like split vew or naviagtion controller

UINavigationItem

in-lining blocks of code 

Fundation of multi=threaded support

block is a language feature 

不使用多线程，就做不了复杂的应用

ＵＩ线程能够持续的对用户做出应答 

Blocks

如何设置segues

look at how we create a UINavigationController in our storyboard

触发segues  把它嵌进这个导舫 控制器

ctrl+ drag 

segues  总是创建一个新的

mvc没有了。

UINavigatonController

UIView abtained from the view propertity of the UIViewController most recently pushed  

toolbarItems     UIBarButton 组成的NSArray

什么时候退出呢

popViewControllerAnimated

在程序里把它弹出去

［self.navigationController popViewControllerAnimated:YES］;

self.popoverConroller

replace 

在拆分的视图控制器里

popovers 型的针对ipad而言 

模式表达可能被滥用

模式下的用户体验是比较挫折的

如何在代码里触发segue呢

心理学游戏

 而是用一个target action 

UITabBarController

Tab Bar Controller   view Controller

you control drag to create theae connection s is Code.

badges 

tabeBarItem＼

the types and styles of table views

the anatomy and diemsions of table views

UITableView's relationship to the UIScrollView superclass

creation of table views in code and with IB

use of the UITableViewController class to tabke 

advantage of its template methods

Understanding Table Views

a list of items that can e scrolled vertically.

this is a common interface design pattern

UIKit provides a powerful suit of clases and protocols to 

make the creation and management of table views

as simple and as effective as possible.

range from a very plain list created by using one 

of the standard styles provided by the SDK

The  Contacts app is an example of an indexed table 

with section headings.

grouped static rows again with section headers.

tabkes the table view customization to wxtremes

two sections,

UITableViews and have identical interaction patterns

Working with the UITableView Family

the heart of the table view are classes protocols,

and view objects that make up the members of 

UITableView family.

UITableView  UITableViewController

UITableViewDelegate   UITableViewDataSource protols

UITableView and UITableViewCell view objects

the classes provide the core functionality for the 

table view ,the protocols define various data and interaction methods

and the view objects provide the physical user interface.

The UITableView Class Hierarchy

a subclass of UIScrollView.which in turn inherits from UIView,

UIResponder, and ultimately NSObject,

UIScrollView provides the scrolling of the table, while UIResponder allows 

the talbe cells to respond to user touches and swipes.

Choosing the Type of Table View.

two basic forms plain and grouped.

have two variations indexed and sectioned

The Plain Table

is the basic vanilia incarnation of the UITableView.

UITableView *tableView = [[UITableView alloc]initWithFrame:tvFrame style:UITableViewStylePlain];

The Indexed Table

builds on the plain table by adding an extra navigation aid in the form of an 

index that appears on the right- hand side of the table view,adjacent

to the scroll area.

Implementing indexes involves UITableViewDataSource protocol methods,

and is covered in detail in Chapter 6.

The Sectioned Table 

as its name suggests, groups its rows into sections.

These sections can have headers.

This type of table view utilises several UITableViewDataSource protols

methods to configure the behavior of the sections and is covered in.

The Grouped Table 

things one step further by separating the sections into a style

that is distinct form the table view's background

each section has a header and footer.

Thease are Views , and are returned by two UITableViewDelegate methods

-(UIView *)tableView:tableView viewForFooterInSection:(NSInteger)section;

-(UIView *)tableView:tableView viewForHeaderInSection:(NSInteger)section;

-(NSString *)tableView:tableView titleForHeaderInSection:(NSInteger)section;

find the dimensions of the headers and footers,

-(CGRect)rectForHeaderInSection:(NSInteger)section;

-(CGRect)rectForFooterInSection:(NSInteger)section;

-(CGRect)rectForSection:(NSInteger)setion;

setting TableView Dimensions

think of it as a window that provides a view of a conveyor belt of cells.

indicated by the tableView's frame property.

the height of the tableView in pixels is available through the contentSize

property, which returns a CGFloat.

at the top and bottom of each belt of cells, you can add a UIView as a static header and footer.

tableHeaderView  and tableFooterView

UIView *tableHeaderView = [[UIView alloc]initWithFrame:CGRectMake(0,0,320,50)];

[tableHeaderView setBackgroundColor:[UIColor blueColor]];

UIView *tableFooterView = [[UIView alloc]initWithFrame:CGRectMake(0,0,320,50)];

[tableFooterView setBackgroundColor:[UIColor blueColor]];

UILabel *headerLabel = [[UILabel alloc] initWithFrame:CGRectMake(10,10,320,25)];

headerLabel.text = @"Header View";

headerLabel.textColor = [UIColor whiteColor];

headerLabel.font = [UIFont boldSystemFornOfSize:22];

headerLabel.backgroundColor = [UIColor clearColor];

UILabel * footerLabel = [[UILabel alloc]initWithFrame:CGRectMake(10,10,320,25)];

footerLabel.text = @"Footer view";

footerLabel.textColor = [UIColor whiteColor];

footerLabel.font = [UIFont boldSystemFontOfSize:22];

footerLabel.backgroundColor = [UIColor clearColor];

[tableHeaderView addSubview:headerLabel];

[tableFooterView addSubView:footerLabel];

[self.tableView setTableHeaderView:tableHeaderVIew];

[self.tableView setTableFooterView:tableFooterView];

controlling the Background of a UITableView

Setting an image as the background of a UITableView 

set the backgroundColor property of your tableView to clearColor

so that the background image is visible

What UITableView Inherits from UIScrollView

Everything that UITableView doesn't explicityly override

contentSize  indicates the full height  that the table

would be if all rows were created and populated at noce

contentOffset  

scrollViewWillBeginDraging is fired just befoe the tableView starts moving    

scrolViewDidScroll is called was stopped.

table views can only scroll vertically

Creating UITableViews

Placing a UITableView into Another View