//  XMGViewController.h

#import <UIKit/UIKit.h>

@interface XMGViewController : UIViewController

@end

//  XMGViewController.m

#import "XMGViewController.h"

#import "XMGShop.h"

#import "XMGShopView.h"

@interface XMGViewController ()

// 购物车

@property (weak, nonatomic) IBOutlet UIView *shopCarView;

// 添加按钮

@property (weak, nonatomic) IBOutlet UIButton *addButton;

// 删除按钮

@property (weak, nonatomic) IBOutlet UIButton *removeButton;

/** 数据数组 */

@property (nonatomic, strong) NSArray *dataArr;

@end

@implementation XMGViewController

/**

 *  懒加载,get方法

 */

- (NSArray *)dataArr{

    if (_dataArr == nil) {

        // 加载数据

        // 1.获取全路径

        NSString *dataPath = [[NSBundle mainBundle] pathForResource:@"shopData.plist" ofType:nil];

        self.dataArr = [NSArray arrayWithContentsOfFile:dataPath];

        // 字典转模型

        // 创建临时数组

        NSMutableArray *tempArray = [NSMutableArray array];

        for (NSDictionary *dict in _dataArr) {

            // 创建shop对象

            XMGShop *shop = [XMGShop shopWithDict:dict];

            // 把模型装入数组

            [tempArray addObject:shop];

        }

        self.dataArr = tempArray;

    }

    return _dataArr;

}

// 初始化数据

- (void)viewDidLoad {

    [super viewDidLoad];

}

/**

 *  添加到购物车

 *

 *  @param button 按钮

 */

- (IBAction)add:(UIButton *)button {

/***********************1.定义一些常量*****************************/

    // 1.总列数

    NSInteger allCols = ;

    // 2.商品的宽度 和 高度

    CGFloat width = ;

    CGFloat height = ;

    // 3.求出水平间距 和 垂直间距

    CGFloat hMargin = (self.shopCarView.frame.size.width - allCols * width) / (allCols -);

    CGFloat vMargin = (self.shopCarView.frame.size.height -  * height) / ;

    // 4. 设置索引

    NSInteger index = self.shopCarView.subviews.count;

    // 5.求出x值

    CGFloat x = (hMargin + width) * (index % allCols);

    CGFloat y = (vMargin + height) * (index / allCols);

/***********************2.创建一个商品*****************************/

   /*

    XMGShopView *shopView = [[XMGShopView alloc] init];

    shopView.frame = CGRectMake(x, y, width, height);

    // 设置数据

     XMGShop *shop = self.dataArr[index];

    shopView.shop = shop;

    [self.shopCarView addSubview:shopView];

    */

    XMGShopView *shopView = [XMGShopView shopViewWithShop:self.dataArr[index]];

    shopView.frame = CGRectMake(x, y, width, height);

    [self.shopCarView addSubview:shopView];

/***********************3.设置数据*****************************/

    // 设置数据

//    XMGShop *shop = self.dataArr[index];

//    [shopView setIcon:shop.icon];

//    [shopView setName:shop.name];

/***********************4.设置按钮的状态*****************************/

    button.enabled = (index != );

    // 5.设置删除按钮的状态

    self.removeButton.enabled = YES;

}

/**

 *  从购物车中删除

 *

 *  @param button 按钮

 */

- (IBAction)remove:(UIButton *)button {

    // 1. 删除最后一个商品

    UIView *lastShopView = [self.shopCarView.subviews lastObject];

    [lastShopView removeFromSuperview];

    // 3. 设置添加按钮的状态

    self.addButton.enabled = YES;

    // 4. 设置删除按钮的状态

    self.removeButton.enabled = (self.shopCarView.subviews.count != );

}

@end

//  XMGShopView.h

#import <UIKit/UIKit.h>

@class XMGShop;

@interface XMGShopView : UIView

/** 商品模型 */

@property (nonatomic, strong) XMGShop *shop;

// 构造方法

- (instancetype)initWithShop: (XMGShop *)shop;

+ (instancetype)shopViewWithShop: (XMGShop *)shop;

@end

//  XMGShopView.m

#import "XMGShopView.h"

#import "XMGShop.h"

@interface XMGShopView ()

/** 图片控件 */

@property (nonatomic, weak) UIImageView *iconView;

/** 标题控件 */

@property (nonatomic, weak) UILabel *titleLabel;

@end

@implementation XMGShopView

/**

 *  初始化子控件(不要设置frame)

 *

 */

- (instancetype)init{

    if (self = [super init]) {

        [self setUp];

    }

    return self;

}

//构造方法，对象方法

- (instancetype)initWithShop:(XMGShop *)shop{

    if (self = [super init]) {

        // 注意:先创建后赋值，不然空指针，

        [self setUp];

        self.shop = shop;//调用set方法

    }

    return self;

}

//构造方法，类方法

+ (instancetype)shopViewWithShop:(XMGShop *)shop{

    return [[self alloc] initWithShop:shop];

}

/**

 *  初始化

 */

- (void)setUp{

    // 1.创建商品的UIImageView对象

    UIImageView *iconView = [[UIImageView alloc] init];

    iconView.backgroundColor = [UIColor blueColor];

    [self addSubview:iconView];

    _iconView = iconView;

    // 2.创建商品标题对象

    UILabel *titleLabel = [[UILabel alloc] init];

    titleLabel.backgroundColor = [UIColor yellowColor];

    titleLabel.textAlignment = NSTextAlignmentCenter; // 居中

    [self addSubview:titleLabel];

    _titleLabel = titleLabel;

}

/**

 *  布局子控件(可以拿到frame)

 */

- (void)layoutSubviews{

    // 0.一定要调用super

    [super layoutSubviews];

    // 1.获取当前控件的尺寸

    CGFloat width = self.frame.size.width;

    CGFloat height = self.frame.size.height;

    // 2.设置子控件的frame

     self.iconView.frame = CGRectMake(, , width, width);

     self.titleLabel.frame = CGRectMake(, width, width, height - width);

}

/**

 *  重写set方法:只要外边传数据就会调用

 *  作用:设置数据

 */

- (void)setShop:(XMGShop *)shop{

    _shop = shop;

    // 设置数据

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

    self.titleLabel.text = shop.name;

}

@end

//  XMGShop.h

#import <Foundation/Foundation.h>

@interface XMGShop : NSObject

/** 图片的名称 */

@property (nonatomic, copy) NSString *icon;

/** 商品的名称 */

@property (nonatomic, copy) NSString *name;

// 提供构造方法

/*

- (instancetype)initWithIcon: (NSString *)icon name: (NSString *)name;

+ (instancetype)shopWithIcon: (NSString *)icon name: (NSString *)name;

 */

- (instancetype)initWithDict:(NSDictionary *)dict;

+ (instancetype)shopWithDict:(NSDictionary *)dict;

@end

//  XMGShop.m

#import "XMGShop.h"

@implementation XMGShop

/*

- (instancetype)initWithIcon:(NSString *)icon name:(NSString *)name{

    if (self = [super init]) {

        self.icon = icon;

        self.name = name;

    }

    return self;

}

+ (instancetype)shopWithIcon:(NSString *)icon name:(NSString *)name{

    return [[self alloc] initWithIcon:icon name:name];

}

 */

- (instancetype)initWithDict:(NSDictionary *)dict{

    if (self = [super init]) {

        self.icon = dict[@"icon"];

        self.name = dict[@"name"];

    }

    return self;

}

+ (instancetype)shopWithDict:(NSDictionary *)dict{

    return [[self alloc] initWithDict:dict];

}

@end