IOS development-Weibo client-basic interface setup (01)

1> create a program loading Interface

-(BOOL) application :( UIApplication *) application didfinishlaunchingwitexceptions :( NSDictionary *) launchOptions

{

// 1> Create a window

Self. window = [[uiappswalloc] initWithFrame: [UIScreenmainScreen]. bounds];

// 2> set the root controller of the window

UITabBarController * tabBarController = [[UITabBarControlleralloc] init];

Self. window. rootViewController = tabBarController;

// 3> display window

[Self. windowmakeKeyAndVisible];

ReturnYES;

}

 

2> LaunchImage Configuration

The Contents. json file in the LaunchImage. launchimage file records the detailed configuration of LaunchImage:

3> cancel APP icon Rendering

4> hide the status bar during program loading

To restore the status bar display after the program is loaded, you can call the [application setStatusBarHidden: NO] Method in the didfinishlaunchingwitexceptions method;

 

5> Add a TabBar Controller and Its subcontrollers

A custom TabBarViewController class inherits the UITabBarController class to create a custom TabBarView, and creates a subcontroller in the viewDidLoad method of this class.

-(Void) viewDidLoad

{

[SuperviewDidLoad];

// Add a sub-Controller

UIViewController * home = [[UIViewControlleralloc] init];

Home. view. backgroundColor = [UIColorredColor];

Home. tabBarItem. title = @ "Homepage ";

Home. tabBarItem. image = [UIImageimageNamed: @ "tabbar_home"];

[Home. tabBarItemsetSelectedImage: [UIImageimageNamed: @ "tabbar_home_selected"];

[SelfaddChildViewController: home];

UIViewController * message = [[UIViewControlleralloc] init];

Message. view. backgroundColor = [UIColororangeColor];

Message. tabBarItem. title = @ "message ";

Message. tabBarItem. image = [UIImageimageNamed: @ "tabbar_message_center"];

[Message. tabBarItemsetSelectedImage: [UIImageimageNamed: @ "tabbar_message_center_selected"];

[SelfaddChildViewController: message];

UIViewController * discover = [[UIViewControlleralloc] init];

Discover. view. backgroundColor = [UIColorgreenColor];

Discover. tabBarItem. title = @ "";

Discover. tabBarItem. image = [UIImage imageNamed: @ "tabbar_discover"];

[Discover. tabBarItemsetSelectedImage: [UIImageimageNamed: @ "tabbar_discover_selected"];

[SelfaddChildViewController: discover];

UIViewController * profile = [[UIViewControlleralloc] init];

Profile. view. backgroundColor = [UIColorblueColor];

Profile. tabBarItem. title = @ "me ";

Profile. tabBarItem. image = [UIImageimageNamed: @ "tabbar_profile"];

[Profile. tabBarItemsetSelectedImage: [UIImageimageNamed: @ "tabbar_profile_selected"];

[SelfaddChildViewController: profile];

}

6> rendering Images

In iOS7, The selectedImage image is rendered blue again. To display the source image, you must cancel the rendering;

Method for canceling rendering call:

SelectedImage = [selectedImage imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal];

 

7> optimized addition of sub-controller code

Optimize the code of adding a sub-controller to TabBarViewController by using the following method:

-(Void) addOneChildViewController :( UIViewController *) viewController withTitle :( NSString *) title imageName :( NSString *) imageName selectedImageName :( NSString *) selectedImageName

{

ViewController. view. backgroundColor = ZFRandomColor;

ViewController. tabBarItem. title = title;

ViewController. tabBarItem. image = [UIImage imageNamed: imageName];

UIImage * image = [UIImage imageNamed: selectedImageName];

If (iOS7 ){

Image = [image imageWithRenderingMode: UIImageRenderingModeAlwaysOriginal];

}

[ViewController. tabBarItem setSelectedImage: image];

[Self addChildViewController: viewController];

}

ZFRandomColor and iOS7 are custom macros, which are defined in the Prefix. pch file:

# Ifdef _ OBJC __

# Import <UIKit/UIKit. h>

# Import <Foundation/Foundation. h>

# Import <CoreData/CoreData. h>

# Define ZFRandomColor [UIColor colorWithRed: arc4random_uniform (256)/255.0 green: arc4random_uniform (256)/255.0 blue: arc4random_uniform (256)/255.0 alpha: 1.0]

# Define iOS7 [[UIDevice currentDevice]. systemVersion doubleValue]> = 7.0

# Endif

The imageWithRenderingMode method is valid only in the iOS7 environment. Therefore, the code needs to add a condition judgment statement to adapt to the system. You can determine whether to compile this method by obtaining the system version of the current running environment;

8> image adaptation

Add a category for UIImage for image system adaptation:

@ Implementation UIImage (Extension)

+ (UIImage *) imageWithName :( NSString *) imageName

{

UIImage * image = nil;

If (iOS7 ){

NSString * name = [imageName stringByAppendingString: @ "_ os7"];

Image = [UIImage imageNamed: name];

}

If (! Image ){

Image = [UIImage imageNamed: imageName];

}

Return image;

}

@ End