iOS Development uiapplication

1 , overview

The UIApplication object is a symbol of the application. Each application has its own UIApplication object, and it is a singleton (only one object, we cannot create a new object, we can only get this object). This singleton object can be obtained by [UIApplication Sharedapplication]. a IOS the first object created after a program is started is uiapplication Object . With UIApplication objects, you can perform some application-level operations.

2 , uiapplication the Common Properties

1. Set the red reminder number in the upper right corner of the application icon

@property (nonatomic) Nsinteger applicationiconbadgenumber;

2, set the visibility of the network indicator

@property (nonatomic,getter=isnetworkactivityindicatorvisible) BOOL networkactivityindicatorvisible;

3 , iOS7 the status bar in

1 , the management of the status bar

Starting with IOS7, the system provides 2 ways to manage the status bar:

The first type:

Through Uiviewcontroller management (each uiviewcontroller can have its own different status bar).

The second type:

Managed by UIApplication (the status bar of an application is managed uniformly by it).

Use Uiviewcontroller to manage the status bar:

In IOS7, by default, the status bar is managed by Uiviewcontroller, and Uiviewcontroller can easily manage the visibility and style of the status bar by implementing the following methods:

(1) style of the status bar

-(Uistatusbarstyle) Preferredstatusbarstyle;

(2) Visibility of the status bar

-(BOOL) Prefersstatusbarhidden;

Using UIApplication to manage the status bar

Use uiapplication to manage the status bar:

If you want to use uiapplication to manage the status bar, you first have to modify the Info.plist settings.

You can then use UIApplication to manage the status bar:

For example: Use a fade-out animation effect to hide the status bar:

[App Setstatusbarhidden:yes Withanimation:uista Tusbaranimationfade];

Set the status bar style to white:

App.statusbarstyle = uistatusbarstylelightcontent;

Hide the status bar:

App.statusbarhidden = YES;

2 , OpenURL

UIApplication has a very powerful OpenURL: method

-(BOOL) OpenURL: (nsurl*) URL;

OpenURL: partial functionality of the method :

(1) Call

UIApplication *app = [UIApplication sharedapplication];

[App Openurl:[nsurl urlwithstring:@ "tel://10086"];

(2) Texting

[App Openurl:[nsurl urlwithstring:@ "sms://10086"];

(3) e-mail

[App Openurl:[nsurl urlwithstring:@ "Mailto://[email protected]"];

(4) Open a webpage resource (auto jump to browser open)

[App Openurl:[nsurl urlwithstring:@ "http://ios.itcast.cn"];

(5) Open other apps

. . . . . . .

iOS Development uiapplication