iOS-UI-應用管理

一.使用MVC

1.模型文件如下

//  MJApp.h

#import <Foundation/Foundation.h>

/**
 copy : NSString
 strong: 一般對象
 weak: UI控件
 assign:基本數據類型
 */

@interface MJApp : NSObject
/**
 *  名稱
 */
@property (nonatomic, copy) NSString *name;
/**
 *  圖標
 */
@property (nonatomic, copy) NSString *icon;

/**
 *  通過字典來初始化模型對象
 *
 *  @param dict 字典對象
 *
 *  @return 已經初始化完畢的模型對象
 */
- (instancetype)initWithDict:(NSDictionary *)dict;

+ (instancetype)appWithDict:(NSDictionary *)dict;
@end

//  MJApp.m

#import "MJApp.h"

@implementation MJApp
- (instancetype)initWithDict:(NSDictionary *)dict
{
    if (self = [super init]) {
        self.name = dict[@"name"];
        self.icon = dict[@"icon"];
    }
    return self;
}

+ (instancetype)appWithDict:(NSDictionary *)dict
{
    return [[self alloc] initWithDict:dict];
}
@end

2.使用xib自定義view

如下圖

//  MJAppView.h

#import <UIKit/UIKit.h>

@class MJApp, MJAppView;

// 聲明一個協議
@protocol MJAppViewDelegate <NSObject>
@optional
- (void)appViewClickedDownloadButton:(MJAppView *)appView;
@end

// 耦合性
@interface MJAppView : UIView

/**
 *  代理
 */
@property (nonatomic, weak) id<MJAppViewDelegate> delegate;

//@property (weak, nonatomic) IBOutlet UIButton *downloadBtn;

//@property (nonatomic, weak) UIView *vcView;
/**
 *  模型數據
 */
@property (nonatomic, strong) MJApp *app;

+ (instancetype)appView;

/**
 *  通過模型數據來創建一個view
 */
+ (instancetype)appViewWithApp:(MJApp *)app;

@end

連線到.m文件中

//  MJAppView.m

#import "MJAppView.h"
#import "MJApp.h"

@interface MJAppView()
@property (weak, nonatomic) IBOutlet UIImageView *iconView;
@property (weak, nonatomic) IBOutlet UILabel *nameLabel;
- (IBAction)download:(UIButton *)sender;
@end

@implementation MJAppView

+ (instancetype)appViewWithApp:(MJApp *)app
{
    NSBundle *bundle = [NSBundle mainBundle];
    // 讀取xib文件(會創建xib中的描述的所有對象,並且按順序放到數組中返回)
    NSArray *objs = [bundle loadNibNamed:@"MJAppView" owner:nil options:nil];
    MJAppView *appView = [objs lastObject];
    appView.app = app;
    return appView;
}

+ (instancetype)appView
{
    return [self appViewWithApp:nil];
}

- (void)setApp:(MJApp *)app
{
    _app = app;
    
    // 1.設置圖標
    self.iconView.image = [UIImage imageNamed:app.icon];
    
    // 2.設置名稱
    self.nameLabel.text = app.name;
}

/**
 *  下載
 */
- (IBAction)download:(UIButton *)btn {
    // 1.讓按鈕失效(文字變爲"已下載")
    btn.enabled = NO;
    
    // 2.通知代理
//    [self.delegate appViewClickedDownloadButton:self];
    if ([self.delegate respondsToSelector:@selector(appViewClickedDownloadButton:)]) {
        [self.delegate appViewClickedDownloadButton:self];
    }
}
@end

3.MJViewController.m代碼如下

//  MJViewController.m

#import "MJViewController.h"
#import "MJApp.h"
#import "MJAppView.h"

@interface MJViewController () <MJAppViewDelegate>
/** 存放應用信息 */
@property (nonatomic, strong) NSArray *apps;
@end

@implementation MJViewController

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 添加應用信息
    
    // 0.總列數(一行最多3列)
    int totalColumns = 3;
    
    // 1.應用的尺寸
    CGFloat appW = 85;
    CGFloat appH = 90;
    
    // 2.間隙 = (控制器view的寬度 - 3 * 應用寬度) / 4
    CGFloat marginX = (self.view.frame.size.width - totalColumns * appW) / (totalColumns + 1);
    CGFloat marginY = 15;
    
    // 3.根據應用個數創建對應的框框(index 0 ~ 11)
    for (int index = 0; index<self.apps.count; index++) {
        // 3.1.創建view
        MJAppView *appView = [MJAppView appViewWithApp:self.apps[index]];
        
        appView.delegate = self;
        
//        appView.downloadBtn.tag = index;
//        [appView.downloadBtn addTarget:self action:@selector(download:) forControlEvents:UIControlEventTouchUpInside];
//        appView.vcView = self.view;
        
        // 3.2.添加view
        [self.view addSubview:appView];
        
        // 3.3.設置frame
        int row = index / totalColumns;
        int col = index % totalColumns;
        // 計算x和y
        CGFloat appX = marginX + col * (appW + marginX);
        CGFloat appY = 30 + row * (appH + marginY);
        appView.frame = CGRectMake(appX, appY, appW, appH);
        
        // 3.4.設置數據
//        appView.app = self.apps[index];
    }
}

/**
 *  當點擊下載按鈕時就會調用
 */
- (void)appViewClickedDownloadButton:(MJAppView *)appView
{
    // 1.取出模型
    MJApp *app = appView.app;
    
    // 2.添加標籤
    UILabel *label = [[UILabel alloc] init];
    label.text = [NSString stringWithFormat:@"成功下載%@", app.name];
    label.font = [UIFont systemFontOfSize:12];
    label.textAlignment = NSTextAlignmentCenter;
    label.textColor = [UIColor whiteColor];
    label.backgroundColor = [UIColor blackColor];
    label.frame = CGRectMake(0, 0, 150, 25);
    label.center = CGPointMake(160, 240);
    label.alpha = 0.0;
    label.layer.cornerRadius = 5;
    label.clipsToBounds = YES;
    [self.view addSubview:label];
    
    // 3.動畫
    [UIView animateWithDuration:1.0 animations:^{
        label.alpha = 0.5;
    } completion:^(BOOL finished) {
        [UIView animateWithDuration:1.0 delay:1.0 options:UIViewAnimationOptionCurveLinear animations:^{
            label.alpha = 0.0;
        } completion:^(BOOL finished) {
            [label removeFromSuperview];
        }];
    }];
}

- (NSArray *)apps
{
    if (_apps == nil) {
        // 初始化
        
        // 1.獲得plist的全路徑
        NSString *path = [[NSBundle mainBundle] pathForResource:@"app.plist" ofType:nil];
        
        // 2.加載數組
        NSArray *dictArray = [NSArray arrayWithContentsOfFile:path];
        
        // 3.將dictArray裏面的所有字典轉成模型對象,放到新的數組中
        NSMutableArray *appArray = [NSMutableArray array];
        for (NSDictionary *dict in dictArray) {
            // 3.1.創建模型對象
            MJApp *app = [MJApp appWithDict:dict];
            
            // 3.2.添加模型對象到數組中
            [appArray addObject:app];
        }
        
        // 4.賦值
        _apps = appArray;
    }
    return _apps;
}

@end

效果圖如下: