IOS 應用程序管理的實現
1. 項目名稱：應用管理
2. 項目截圖展示
3. 項目功能
展示應用圖標，名稱和下載按鈕
點擊下載按鈕，出現“正在下載”圖標
4. 項目代碼
模型代碼：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;/** 使用字典實例化模型 */- (instancetype)initWithDict:(NSDictionary *)dict;/** 快速實例化一個對象 */+ (instancetype)appInfoWithDict:(NSDictionary *)dict;/** 返回所有plist中的數據模型數組 */+ (NSArray *)appList;@end
模型代碼：AppInfo.m
#import "AppInfo.h"@implementation AppInfo// 合成指令，主動指定屬性使用的成員變量名稱@synthesize image = _image;//圖片模型- (UIImage *)image{ if (_image == nil) { _image = [UIImage imageNamed:self.icon]; } return _image;}- (instancetype)initWithDict:(NSDictionary *)dict{ self = [super init]; if (self) { // 用字典給屬性賦值 // self.name = dict[@"name"]; //將字典的內容賦值給屬性 // 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]]; // 創建一個臨時可變數組 NSMutableArray *arrayM = [NSMutableArray array]; // 遍歷數組，依次轉換模型 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/** 類方法，方便調用視圖 */+ (instancetype)appView;/** 實例化視圖，并使用appInfo設置視圖的顯示 */+ (instancetype)appViewWithAppInfo:(AppInfo *)appInfo;// 自定義視圖中顯示的數據來源是數據模型// 使用模型設置自定義視圖的顯示@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//實例化xib+ (instancetype)appView{ return [[[NSBundle mainBundle] loadNibNamed:@"AppView" owner:nil options:nil] lastObject];}//根據模型實例化xib+ (instancetype)appViewWithAppInfo:(AppInfo *)appInfo{ // 1. 實例化一個視圖 AppView *view = [self appView]; // 2. 設置視圖的顯示 view.appInfo = appInfo;//包含，AppView有appInfo的屬性 // 3. 返回視圖 return view;}/** 利用setter方法設置視圖的界面顯示 */- (void)setAppInfo:(AppInfo *)appInfo{ _appInfo = appInfo; self.label.text = appInfo.name; self.iconView.image = appInfo.image;}/** 按鈕監聽方法 */- (IBAction)click:(UIButton *)button{ // 添加一個UILabel到界面上 UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(80, 400, 160, 40)]; // 數值是0表示黑色，1表示純白；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就是視圖控制器中的self.view [self.superview addSubview:label]; // 動畫效果 label.alpha = 0.0; // 禁用按鈕，如果點擊了按鈕以后就禁用按鈕 button.enabled = NO; // 動畫結束之后刪除 [UIView animateWithDuration:1.0f animations:^{ // 要修改的動畫屬性 label.alpha = 1.0; } completion:^(BOOL finished) { [UIView animateWithDuration:1.0 animations:^{ label.alpha = 0.0; } completion:^(BOOL finished) [label removeFromSuperview]; }]; }];}@endViewController.m
#import "ViewController.h"#import "AppInfo.h"#import "AppView.h"#define kAppViewW 80#define kAppViewH 90#define kColCount 3#define kStartY 20@interface ViewController ()/** 應用程序列表 */@property (nonatomic, strong) NSArray *appList;@end@implementation ViewController- (NSArray *)appList{ if (_appList == nil) { _appList = [AppInfo appList]; } return _appList;}- (void)viewDidLoad{ [super viewDidLoad]; // 搭建九宮格 // 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); //加載第i個xib視圖 AppView *appView = [AppView appViewWithAppInfo:self.appList[i]]; // 設置視圖位置 appView.frame = CGRectMake(x, y, kAppViewW, kAppViewH); [self.view addSubview:appView]; }}5. 本項目必須掌握的代碼段
字典轉模型
- (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]]; // 創建一個臨時可變數組 NSMutableArray *arrayM = [NSMutableArray array]; // 遍歷數組，依次轉換模型 for (NSDictionary *dict in array) { [arrayM addObject:[AppInfo appInfoWithDict:dict]]; } return arrayM;}KVC
[self setValuesForKeysWithDictionary:dict];
6. 筆記
字典轉模型：
plist文件有多個字典，把字典的元素轉換成模型類對象的成員變量，將模型類對象放入數組中 模型的屬性名稱和plist文件中的key名稱必須一致
如有疑問請留言或者到本站社區交流討論，感謝閱讀，希望能幫助到大家，謝謝大家對本站的支持！
新聞熱點
疑難解答
