iPhone的九宫格实现

在 iPhone 软件里实现手机上经典的九宫格界面

 

核心就这2个方法:

//Power by ieliwb.com
- ( void ) viewDidLoad {
     [ super viewDidLoad ] ;
    
     NSArray * imageNames = [ NSArray arrayWithObjects :
                                        @ " ico_mobile.png " ,
                                        @ " ico_idcard.png " ,
                                        @ " ico_postcode.png " ,
                                        @ " ico_flight.png " ,
                                        @ " ico_translate.png " ,
                                        @ " ico_phone.png " ,
                                        @ " ico_car.png " ,
                                        @ " ico_health.png " ,
                                        @ " ico_bjxm.png " , nil ] ;
 
     UIButton * Btn ;
     for ( int i = 0 ; i < 9 ; i ++ ) {
         CGRect frame ;
         Btn = [[ UIButton buttonWithType : UIButtonTypeCustom ] retain ] ;
         [ Btn setImage : [ UIImage imageNamed : [ imageNames objectAtIndex : i ]] forState : UIControlStateNormal ] ; //设置按钮图片
        
         Btn . tag = i ;
        
         frame . size . width = 59 ; //设置按钮坐标及大小
         frame . size . height = 75 ;
         frame . origin . x = ( i % 3 ) * ( 59 + 32 ) + 40 ;
         frame . origin . y = floor ( i / 3 ) * ( 75 + 24 ) + 40 ;
         [ Btn setFrame : frame ] ;
        
         [ Btn setBackgroundColor : [ UIColor clearColor ]] ;
         [ Btn addTarget : self action :@ selector ( btnPressed : ) forControlEvents : UIControlEventTouchUpInside ] ;
         [ self . view addSubview : Btn ] ;
         [ Btn release ] ;
        
     }
        
}
 
//响应按钮事件
- ( void ) btnPressed : ( id ) sender {
     UIButton * Btn = ( UIButton * ) sender ;
         int index = Btn . tag ;
    
     switch ( index ) {
         case 0 :
             if ( mobileController == nil )
                 mobileController = [[ MobileController alloc ] init ] ;
             [ self . navigationController pushViewController : mobileController animated : YES ] ;
             break ;
         //其他几个控制器类似
     }
 
}

 

九宫格背景修改可以这样实现:

- ( void ) loadView {
     UIImageView * contentView = [[ UIImageView alloc ] initWithFrame : [[ UIScreen mainScreen ] applicationFrame ]] ;
     [ contentView setImage : [ UIImage imageNamed :@ " subview_9_bg.png " ]] ;
     [ contentView setUserInteractionEnabled : YES ] ;
     self . view = contentView ;
     [ contentView release ] ;
}
 

 

UINavigationBar背景图片可以这样实现:

@ implementation UINavigationBar ( CustomImage )
- ( void ) drawRect : ( CGRect ) rect {
     UIImage * image = [ UIImage imageNamed : @ " top_bg.png " ] ;
     [ image drawInRect : CGRectMake ( 0 , 0 , self . frame . size . width , self . frame . size . height )] ;
}
@ end