IOS 应用程序管理的实现
IOS 应用程序管理的实现
1. 项目名称:应用管理
2. 项目截图展示
3. 项目功能
展示应用图标,名称和下载按钮
点击下载按钮,出现“正在下载”图标
4. 项目代码
模型代码:AppInfo.h
#import <Foundation/Foundation.h> #import <UIKit/UIKit.h> @interface AppInfo : NSObject @property (nonatomic, copy) NSString *name; @property (nonatomic, copy) NSString *icon; @property (nonatomic, strong, readonly) UIImage *image; /** 使用字典实例化模型 */ - (instancetype)initWithDict:(NSDictionary *)dict; /** 快速实例化一个对象 */ + (instancetype)appInfoWithDict:(NSDictionary *)dict; /** 返回所有plist中的数据模型数组 */ + (NSArray *)appList; @end
模型代码:AppInfo.m
#import "AppInfo.h" @implementation AppInfo // 合成指令,主动指定属性使用的成员变量名称 @synthesize image = _image; //图片模型 - (UIImage *)image { if (_image == nil) { _image = [UIImage imageNamed:self.icon]; } return _image; } - (instancetype)initWithDict:(NSDictionary *)dict { self = [super init]; if (self) { // 用字典给属性赋值 // self.name = dict[@"name"]; //将字典的内容赋值给属性 // self.icon = dict[@"icon"]; [self setValuesForKeysWithDictionary:dict]; } return self; } + (instancetype)appInfoWithDict:(NSDictionary *)dict { return [[self alloc] initWithDict:dict]; } + (NSArray *)appList { NSArray *array = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"app.plist" ofType:nil]]; // 创建一个临时可变数组 NSMutableArray *arrayM = [NSMutableArray array]; // 遍历数组,依次转换模型 for (NSDictionary *dict in array) { [arrayM addObject:[AppInfo appInfoWithDict:dict]]; } return arrayM; } @end
模型View:AppView.h
#import <UIKit/UIKit.h> @class AppInfo; @interface AppView : UIView /** 类方法,方便调用视图 */ + (instancetype)appView; /** 实例化视图,并使用appInfo设置视图的显示 */ + (instancetype)appViewWithAppInfo:(AppInfo *)appInfo; // 自定义视图中显示的数据来源是数据模型 // 使用模型设置自定义视图的显示 @property (nonatomic, strong) AppInfo *appInfo; @end
模型View:AppView.m
#import "AppView.h" #import "AppInfo.h" @interface AppView() @property (weak, nonatomic) IBOutlet UIImageView *iconView; @property (weak, nonatomic) IBOutlet UILabel *label; @end @implementation AppView //实例化xib + (instancetype)appView { return [[[NSBundle mainBundle] loadNibNamed:@"AppView" owner:nil options:nil] lastObject]; } //根据模型实例化xib + (instancetype)appViewWithAppInfo:(AppInfo *)appInfo { // 1. 实例化一个视图 AppView *view = [self appView]; // 2. 设置视图的显示 view.appInfo = appInfo;//包含,AppView有appInfo的属性 // 3. 返回视图 return view; } /** 利用setter方法设置视图的界面显示 */ - (void)setAppInfo:(AppInfo *)appInfo { _appInfo = appInfo; self.label.text = appInfo.name; self.iconView.image = appInfo.image; } /** 按钮监听方法 */ - (IBAction)click:(UIButton *)button { // 添加一个UILabel到界面上 UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(80, 400, 160, 40)]; // 数值是0表示黑色,1表示纯白;alpha表示透明度 label.backgroundColor = [UIColor colorWithWhite:0.0 alpha:0.2]; label.text = self.appInfo.name; label.textAlignment = NSTextAlignmentCenter; // self.superview就是视图控制器中的self.view [self.superview addSubview:label]; // 动画效果 label.alpha = 0.0; // 禁用按钮,如果点击了按钮以后就禁用按钮 button.enabled = NO; // 动画结束之后删除 [UIView animateWithDuration:1.0f animations:^{ // 要修改的动画属性 label.alpha = 1.0; } completion:^(BOOL finished) { [UIView animateWithDuration:1.0 animations:^{ label.alpha = 0.0; } completion:^(BOOL finished) [label removeFromSuperview]; }]; }]; } @end
ViewController.m
#import "ViewController.h" #import "AppInfo.h" #import "AppView.h" #define kAppViewW 80 #define kAppViewH 90 #define kColCount 3 #define kStartY 20 @interface ViewController () /** 应用程序列表 */ @property (nonatomic, strong) NSArray *appList; @end @implementation ViewController - (NSArray *)appList { if (_appList == nil) { _appList = [AppInfo appList]; } return _appList; } - (void)viewDidLoad { [super viewDidLoad]; // 搭建九宫格 // 320 - 3 * 80 = 80 / 4 = 20 CGFloat marginX = (self.view.bounds.size.width - kColCount * kAppViewW) / (kColCount + 1); CGFloat marginY = 10; for (int i = 0; i < self.appList.count; i++) { // 行 int row = i / kColCount; // 列 int col = i % kColCount; CGFloat x = marginX + col * (marginX + kAppViewW); CGFloat y = kStartY + marginY + row * (marginY + kAppViewH); //加载第i个xib视图 AppView *appView = [AppView appViewWithAppInfo:self.appList[i]]; // 设置视图位置 appView.frame = CGRectMake(x, y, kAppViewW, kAppViewH); [self.view addSubview:appView]; } }
5. 本项目必须掌握的代码段
字典转模型
- (instancetype)initWithDict:(NSDictionary *)dict { self = [super init]; if (self) { [self setValuesForKeysWithDictionary:dict]; } return self; } + (instancetype)appInfoWithDict:(NSDictionary *)dict { return [[self alloc] initWithDict:dict]; } + (NSArray *)appList { NSArray *array = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"app.plist" ofType:nil]]; // 创建一个临时可变数组 NSMutableArray *arrayM = [NSMutableArray array]; // 遍历数组,依次转换模型 for (NSDictionary *dict in array) { [arrayM addObject:[AppInfo appInfoWithDict:dict]]; } return arrayM; }
KVC
[self setValuesForKeysWithDictionary:dict];
6. 笔记
字典转模型:
plist文件有多个字典,把字典的元素转换成模型类对象的成员变量,将模型类对象放入数组中 模型的属性名称和plist文件中的key名称必须一致
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