iOS Development - Basic Framework

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This basic framework mainly includes the extension of UITabBarController, UINavigationController and UIBarButtonItem classes. It mainly solves the problem of too many subviews being created, encapsulates the subview creation with UINavigationController, and then adds it to the ChildViewController view of UITabBarController. It also sets the font size and color of UITabBarItem of UITabBarController. Without further ado, here are the codes.

1. Inherit NPTabBarController created by UITabBarController

1. Set the font style on the tabbar

 #pragma mark - Set the text above the tabbar setTitleTextAttributes
 - ( void )setTabBarTitleAttributesStyle
 {
    NSMutableDictionary *attrs = [NSMutableDictionary dictionary];
 //Usually the font size  
    attrs[NSFontAttributeName] = [UIFont systemFontOfSize: 16 ];
 //Usually the font color  
    attrs[NSForegroundColorAttributeName] = [UIColor lightGrayColor]; 
 
    NSMutableDictionary *selectAttrs = [NSMutableDictionary dictionary];
 //Select font size  
    selectAttrs[NSFontAttributeName] = [UIFont systemFontOfSize: 16 ];
 //Select font color  
    selectAttrs[NSForegroundColorAttributeName] = [UIColor darkGrayColor]; 
 
 //UI_APPEARANCE_SELECTOR Appearance  
    UITabBarItem *item = [UITabBarItem appearance];
 //tabbar usual font style  
    [item setTitleTextAttributes:attrs forState:UIControlStateNormal];
 //tabbar selected font style  
    [item setTitleTextAttributes:selectAttrs forState:UIControlStateSelected];
 }

2. Navigation subview encapsulation

 #pragma mark - Navigation subview encapsulation
 - ( void )setChildVC:(UIViewController *)ChildVC title:(NSString *)title image:(NSString *)image selectImgage:(NSString *)selectImage { 
 
 //Note the view hierarchy. The top one is UINavigationController. Creating a view is to give a UINavigationController  
    NPNavigationController *nav = [[NPNavigationController alloc] initWithRootViewController:ChildVC];
 //The subview displays the tabbar title displayed on the UITabbarController  
    nav.tabBarItem.title = title;
 //The subview displays the unselected tabbar image on the UITabbarController  
    nav.tabBarItem.image = [UIImage imageNamed:image];
 //The subview displays the image of the selected tabbar on the UITabbarController  
    nav.tabBarItem.selectedImage = [UIImage imageNamed:selectImage];
 //Subview background color  
    nav.view.backgroundColor = [UIColor grayColor];
 //Note that the title displayed is the title of the subview, not UINavigationController  
    ChildVC.navigationItem.title = title;
 //Add subview  
    [self addChildViewController:nav]; 
 
 }

2. Inherit UINavigationController to create NPNavigationController

1. Rewrite -(void)pushVewController:(UIViewConntroller*)viewCOntroller animated:(Bool)animated method

 - ( void )pushViewController:(UIViewController *)viewController animated:(BOOL)animated 
 
 //Judge whether self.childViewControllers has obtained all child controllers. When self.childViewControllers.count is 0, there are only child controllers, and the return button is disabled.  
 if (self.childViewControllers.count > 0 ) {
 //Customize the back button  
       UIButton *returnBtn = [UIButton buttonWithType:UIButtonTypeCustom];
 //Set title: return  
       [returnBtn setTitle:@ "return" forState:UIControlStateNormal];
 //Download image normally  
       [returnBtn setImage:[UIImage imageNamed:@ "black" ] forState:UIControlStateNormal];
 //Highlight image  
       [returnBtn setImage:[UIImage imageNamed:@ "grat" ] forState:UIControlStateHighlighted];
 //Normal title color  
       [returnBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
 //Highlight title color  
       [returnBtn setTitleColor:[UIColor lightGrayColor] forState:UIControlStateHighlighted];
 //Set the button position and size. Note that the position has no effect here.  
       [returnBtn setFrame:CGRectMake( 0 , 0 , 70 , 20 )];
 //Button internal alignment  
       [returnBtn setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];
 //Set the internal position of the image  
       [returnBtn setContentEdgeInsets:UIEdgeInsetsMake( 0 , 0 , 0 , 0 )];
 //Add click event  
       [returnBtn addTarget:self action: @selector (returnBtnClick) forControlEvents:UIControlEventTouchUpInside];
 //Hide the tabbar when the view is pushed  
       viewController.hidesBottomBarWhenPushed = YES;
 //Customize the leftBarButtonItem of the push view  
       viewController.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:returnBtn];
 }
 //The sub-controller pushes the view through this method  
   [ super pushViewController:viewController animated:animated];

3. Add the UIBarButtonItem class extension UIBarButtonItem + NPBarbutton, create the UIbarbuttonItem class method

1. UIbarbuttonItem class method

 /**
 *Create a UIBarbuttonItem class method. This method is a class method that creates a button. The parameters passed in are: image (normally displayed image), hightImage (highlighted image), target (target object), and action (click behavior).
 */  
 + (instancetype)itemWithImage:(NSString *)image hightImage:(NSString *)hightImage target:(id)target action:(SEL)action
 {
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    [btn setBackgroundImage:[UIImage imageNamed:image] forState:UIControlStateNormal];
    [btn setBackgroundImage:[UIImage imageNamed:hightImage] forState:UIControlStateNormal];
 //btnsize is the size of the Beijing picture  
    CGSize btnsize = btn.currentBackgroundImage.size;
 //Set the frame of btn  
    [btn setFrame:CGRectMake( 0 , 0 , btnsize.width, btnsize.height)];
    [btn addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];
 return [[self alloc] initWithCustomView:btn];
 }

The above is the main implementation of the basic framework. There are still some shortcomings, and the gesture sliding return is not written.

Promote MarkDown syntax link: http://www.jianshu.com/p/7cc9c26e8b7a Author: Damao Group

Download the demo of this article: http://code.cocoachina.com/view/129999 Author: NiePlus