ios17--自定义控件2改进
控制器： // // XMGViewController.h #import <UIKit/UIKit.h> @interface XMGViewController : UIViewController@end // // XMGViewController.m #import "XMGViewController.h" #import "XMGShop.h" #import "XMGShopView.h" @interface XMGViewController () @property (weak, nonatomic) IBOutlet UIView *shopCarView; @property (weak, nonatomic) IBOutlet UIButton *addButton; @property (weak, nonatomic) IBOutlet UIButton *removeButton; @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*****************************/ /* 原来的分开创建： // 1.创建商品的view UIView *shopView = [[UIView alloc] init]; // 2.设置frame shopView.frame = CGRectMake(x, y, width, height); // 3.设置背景颜色 shopView.backgroundColor = [UIColor greenColor]; // 4.添加到购物车 [self.shopCarView addSubview:shopView]; // 5.创建商品的UIImageView对象 UIImageView *iconView = [[UIImageView alloc] init]; iconView.frame = CGRectMake(0, 0, width, width); iconView.backgroundColor = [UIColor blueColor]; [shopView addSubview:iconView]; // 6.创建商品标题对象 UILabel *titleLabel = [[UILabel alloc] init]; titleLabel.frame = CGRectMake(0, width, width, height - width); titleLabel.backgroundColor = [UIColor yellowColor]; titleLabel.textAlignment = NSTextAlignmentCenter; // 居中 [shopView addSubview:titleLabel]; */ XMGShopView *shopView = [[XMGShopView alloc] init]; shopView.frame = CGRectMake(x, y, width, height); [self.shopCarView addSubview:shopView]; // shopView.titleLabel = nil; /***********************3.设置数据*****************************/ // 设置数据 XMGShop *shop = self.dataArr[index]; /* shopView.iconView.image = [UIImage imageNamed:shop.icon]; shopView.titleLabel.text = shop.name; */ [shopView setIcon:shop.icon]; [shopView setName:shop.name]; /***********************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 自定义控件： // // XMGShopView.h #import <UIKit/UIKit.h> @interface XMGShopView : UIView // readonly 只会调用get方法 /** 图片控件 */ //@property (nonatomic, weak, readonly) UIImageView *iconView;// [self addSubview:iconView];已经有强指针引用了，这里用weak /** 标题控件 */ //@property (nonatomic, weak, readonly) UILabel *titleLabel; // 提供接口方法 - (void)setIcon: (NSString *)icon; - (void)setName: (NSString *)name; @end // // XMGShopView.m #import "XMGShopView.h" @interface XMGShopView () //扩展属性 @property (nonatomic, strong) UIImageView *iconView;//[self addSubview:iconView];有强指针指向了，用weak @property (nonatomic, strong) UILabel *titleLabel; @end @implementation XMGShopView /** * 初始化子控件(不要设置frame) * */ - (instancetype)init{ if (self = [super init]) { // 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; } return self; } /** * 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(0, 0, width, width); self.titleLabel.frame = CGRectMake(0, width, width, height - width); } - (void)setIcon:(NSString *)icon{ // 设置数据 self.iconView.image = [UIImage imageNamed:icon]; } - (void)setName:(NSString *)name{ // 设置数据 self.titleLabel.text = name; } @end bean: // // 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 本文转自农夫山泉别墅博客园博客，原文链接：http://www.cnblogs.com/yaowen/p/7466778.html，如需转载请自行联系原作者
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