ios21--xib例子

Posted 2020-10-05 672530440

故事板控制器：

//
//  XMGViewController.m
//  03-综合练习
//
//  Created by xiaomage on 15/12/28.
//  Copyright © 2015年 小码哥. All rights reserved.
//

#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
 */
- (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 = 3;
    // 2.商品的宽度 和 高度
    CGFloat width = 80;
    CGFloat height = 100;
    // 3.求出水平间距 和 垂直间距
    CGFloat hMargin = (self.shopCarView.frame.size.width - allCols * width) / (allCols -1);
    CGFloat vMargin = (self.shopCarView.frame.size.height - 2 * height) / 1;
    // 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 shopView];
    shopView.frame = CGRectMake(x, y, width, height);
    // 设置数据
    shopView.shop = self.dataArr[index];//set方法
    [self.shopCarView addSubview:shopView];
 

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

    button.enabled = (index != 5);
    
    // 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 != 0);
    
}
@end

xib界面：

xib界面对应的类：

//
//  XMGShopView.h

#import <UIKit/UIKit.h>
@class XMGShop;

@interface XMGShopView : UIView
/** 数据模型 */
@property (nonatomic, strong) XMGShop *shop;

// 快速构造方法
+ (instancetype)shopView;
@end

//
//  XMGShopView.m

#import "XMGShopView.h"
#import "XMGShop.h"

@interface XMGShopView ()

@property (weak, nonatomic) IBOutlet UIImageView *iconView;//跟xib界面连线了的
@property (weak, nonatomic) IBOutlet UILabel *titlelabel;//跟xib界面连线了的

@end

@implementation XMGShopView

+ (instancetype)shopView{
    //return [[[NSBundle mainBundle] loadNibNamed:@"XMGShopView" owner:nil options:nil] firstObject];  //XMGShopView是xib的名字
    return [[[NSBundle mainBundle] loadNibNamed:NSStringFromClass(self) owner:nil options:nil] firstObject];
}

//- (void)awakeFromNib   //加子控件

- (void)setShop:(XMGShop *)shop{
    _shop = shop;
    
    // 设置界面图片和文字
    self.iconView.image = [UIImage imageNamed:shop.icon];
    self.titlelabel.text = shop.name;
}
@end

xib界面的数据bean类：

//
//  XMGShop.h
//  03-综合练习
//
//  Created by xiaomage on 15/12/29.
//  Copyright © 2015年 小码哥. All rights reserved.
//

#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
//  03-综合练习
//
//  Created by xiaomage on 15/12/29.
//  Copyright © 2015年 小码哥. All rights reserved.
//

#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

故事板：