九宫格--xib，MVC封装

-------------------------------Model声明-----------------------

#import <Foundation/Foundation.h>

@interface CZApp : NSObject

//创建能够描述数据源plist文件key的属性

//应用名称

@property (nonatomic,copy)
NSString *name;

//应用图标

@property (nonatomic,copy)
NSString *icon;

//对象方法，返回当前模型对象

- (instancetype) initWithDic:(NSDictionary *)dic;

//类方法，返回当前
模型对象

+ (instancetype) appWithDic:(NSDictionary *)dic;

//模型类的成员：返回字典数组

+ (NSArray *) apps;

@end
-------------------------------Model实现-----------------------

#import "CZApp.h"

@implementation CZApp

//对象方法，返回当前模型对象

- (instancetype)initWithDic:(NSDictionary *)dic

{

    if (self=[super
init]) {

        self.name=dic[@"name"];

        self.icon=dic[@"icon"];

    }

    return 
self;

}

//类方法，返回当前
模型对象

+ (instancetype)appWithDic:(NSDictionary *)dic

{

    return [[self
alloc] initWithDic:dic];

}

//返回当前 plist文件中的数据
，以字典的形式存储在数组中

+ (NSArray *)apps

{

   
//对修改封闭--修改局部类

    //1.获取数据源 
字典数组

    NSArray *sourceArr=[NSArray
arrayWithContentsOfFile:[[NSBundle
mainBundle] pathForResource:@"app.plist"
ofType:nil]];

   
//2.将字典数组转换为模型数组

   
//创建可变的模型数组

    NSMutableArray *desArr=[NSMutableArray
array];

        //2.1.遍历原始的字典数组

    for (NSDictionary *dic
in sourceArr) {

        //2.2:将当前字典转换为模型

        //CZApp *app=[[CZApp alloc] initWithDic:dic];

        CZApp *app=[CZApp
appWithDic:dic];

        [desArr addObject:app];

    }

    return  desArr;

}

@end

-------------------------------View声明-----------------------

#import <UIKit/UIKit.h>

@class CZApp;

@interface CZAppView :
UIView

//1.返回当前
自定义的view

+ (instancetype) appView;

//2.为当前 view中的成员赋值

@property (nonatomic,strong)
CZApp *app;

@end
-------------------------------View实现-----------------------

#import "CZAppView.h"

#import "CZApp.h"

@interface CZAppView ()

@property (weak,
nonatomic) IBOutlet
UIImageView *iconView;

@property (weak,
nonatomic) IBOutlet
UILabel *nameView;

@end

@implementation CZAppView

+ (instancetype)appView

{

    return [[[NSBundle
mainBundle] loadNibNamed:@"CZAppView"
owner:nil
options:nil]
lastObject];

}

//重写属性的setter方法

- (void)setApp:(CZApp *)app

{

    _app=app;

   
//tag本身不直观
如果以后tag值有变化
，那么代码需要修改

    self.iconView.image=[UIImage
imageNamed:app.icon];

    self.nameView.text=app.name;

}

@end
-----------------------------Controller实现-----------------------

#import "ViewController.h"

#import "CZApp.h"

#import "CZAppView.h"

#define cnt 3

@interface
ViewController ()

//创建模型数组

@property (nonatomic,strong)
NSArray *apps;

@end

@implementation ViewController

//懒加载

- (NSArray *)apps

{

    if(_apps==NULL)

    {

        _apps=[CZApp
apps];

    }

    return  _apps;

}

- (void)viewDidLoad {

    [super
viewDidLoad];

    //设置间距

    CGFloat padding=15;

    //2.循环创建appView

    for (int i=0; i<self.apps.count; i++) {

        //创建自定义view

        CZAppView *appView=[CZAppView
appView];

        CGFloat width=appView.frame.size.width;

        CGFloat height=appView.frame.size.height;

        //计算appView水平坐标

        CGFloat appViewX=padding+(i%cnt)*(padding+width);

        CGFloat appViewY=padding+(i/cnt)*(padding+height);

        

        //2.设置通过xib创建的view的frame

        appView.frame=CGRectMake(appViewX, appViewY, width,height);

        //添加到控制器的view中

        [self.view
addSubview:appView];

        CZApp *app=self.apps[i];

        //为xib创建的view的子控件赋值

        //[appView setApp:app];

        appView.app=app;

    }

}

@end