封装字典转模型 懒加载 MVC设计模式

代码详情：ViewController.m

////  ViewController.m#import "ViewController.h"#import "CZAppInfo.h"@interface ViewController ()//存储从plist中获取的数据@property (nonatomic, strong) NSArray *appInfos;@end@implementation ViewController//1 懒加载- (NSArray *)appInfos{    if (_appInfos == nil) {        //1.1 bundle        NSBundle *bundle = [NSBundle mainBundle];        //1.2 获取plist的路径        NSString *path = [bundle pathForResource:@"app" ofType:@"plist"];        //1.3 加载plist        NSArray *dicArray = [NSArray arrayWithContentsOfFile:path];                NSMutableArray *tmpArray = [NSMutableArray array];        //1.4 字典转换模型        for (NSDictionary *dic in dicArray) {            CZAppInfo *appInfo = [[CZAppInfo alloc] init];            appInfo.name = dic[@"name"];            appInfo.icon = dic[@"icon"];                        [tmpArray addObject:appInfo];        }                _appInfos = tmpArray;    }    return _appInfos;}- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.//    NSLog(@"%@",NSHomeDirectory());        //2 测试数据//    NSLog(@"%@",self.appInfos);            CGFloat subViewW = 100;    CGFloat subViewH = 100;    //        子view的横向间距  =  (父view的宽度- 3 * 子view的宽度) / 4    CGFloat marginX = (self.view.frame.size.width - 3 * subViewW) / 4;    //        子view的纵向间距 =  20    CGFloat marginY = 20;        //3 动态生成9宫格的方块    for (int i = 0; i < self.appInfos.count; i++) {        //动态生成view        UIView *subView = [[UIView alloc] init];        [self.view addSubview:subView];                //计算frame      //        当前子view的行号 = 当前遍历到得索引值 / 总列数        int row = i / 3;//        当前子view的列号 = 当前遍历到得索引值 % 总列数        int column = i % 3;//        //        子view横坐标的公式 =  子view的横向间距  +  列号 * (子view的横向间距+ 子view的宽度)        CGFloat subViewX = marginX + column * (marginX + subViewW);//        子view纵坐标的公式 = 20 + 行号 * (子view的纵向间距+ 子view的高度)        CGFloat subViewY = 30 + row * (marginY + subViewH);                subView.frame = CGRectMake(subViewX, subViewY, subViewW, subViewH);//        subView.backgroundColor = [UIColor redColor];                        //取得当前遍历到得数据        CZAppInfo *appInfo = self.appInfos[i];        //        appInfo[@"name"]//        appInfo[@"icon"];                        [self displayAppInfo:appInfo subView:subView];            }}//方法的功能 生成三个子控件，显示应用信息//方法的返回值//方法的参数//方法内部的代码- (void)displayAppInfo:(CZAppInfo *)appInfo subView:(UIView *)subView{    CGFloat subViewW = subView.frame.size.width;    //4 生成3个子控件    //4.1 iconView    UIImageView *iconView = [[UIImageView alloc] init];        iconView.image = [UIImage imageNamed:appInfo.icon];    [subView addSubview:iconView];    //计算frame    CGFloat iconW = 60;    CGFloat iconH = 60;    CGFloat iconY = 0;    CGFloat iconX = (subViewW - iconW) / 2;    iconView.frame = CGRectMake(iconX, iconY, iconW, iconH);        //4.2 nameView    UILabel *nameView = [[UILabel alloc] init];    [subView addSubview:nameView];        //计算frame    CGFloat nameW = subViewW;    CGFloat nameH = 20;    CGFloat nameX = 0;    CGFloat nameY = iconH;    nameView.frame = CGRectMake(nameX, nameY, nameW, nameH);    //    nameView.text = appInfo.name;    //文字大小    nameView.font = [UIFont systemFontOfSize:15];    //文字居中    nameView.textAlignment = NSTextAlignmentCenter;    //    //        nameView.numberOfLines;        //4.3 下载按钮    UIButton *downloadView = [UIButton buttonWithType:UIButtonTypeCustom];    [subView addSubview:downloadView];    //计算frame    CGFloat downloadW = iconW;    CGFloat downloadH = 20;    CGFloat downloadX = iconX;    //获得label的最大y值    CGFloat downloadY = CGRectGetMaxY(nameView.frame);    downloadView.frame = CGRectMake(downloadX, downloadY, downloadW, downloadH);        [downloadView setTitle:@"下载" forState:UIControlStateNormal];        [downloadView setBackgroundImage:[UIImage imageNamed:@"buttongreen"] forState:UIControlStateNormal];    [downloadView setBackgroundImage:[UIImage imageNamed:@"buttongreen_highlighted"] forState:UIControlStateHighlighted];    //设置按钮文字的大小    downloadView.titleLabel.font = [UIFont systemFontOfSize:15];    //给按钮注册事件    [downloadView addTarget:self action:@selector(downloadClick) forControlEvents:UIControlEventTouchUpInside];    //    downloadView.tag = i;}- (void)downloadClick{    NSLog(@"==");}@end

代码详情：CZAppInfo.h

//#import <Foundation/Foundation.h>@interface CZAppInfo : NSObject@property (nonatomic,copy) NSString *name;@property (nonatomic,copy) NSString *icon;@end

本文中自己已经传入plist文件 。。。。。

懒加载在用的时候一定要用self.array，因为只有这样才能调用他的get方法。。。否则就调用不到了

字典转模型的时候有三个数组，一个是全局的，存对象。。。在用到的时候要再赋给对象，然后用对象进行赋值@property (nonatomic, strong) NSArray *appInfos;

第二个是将字典取出来的数组，将网络请求的数组同个这个数组创建，然后通过for in方法把字典取出来，然后赋给对象。 NSArray *dicArray = [NSArray arrayWithContentsOfFile:path];

第三个数组是可变数组，在第二个数组中取出字典放在对象中，然后将对象一个一个存进去。。最后赋给第一个数组。NSMutableArray *tmpArray = [NSMutableArray array];

我们的数据应该封装起来，MVC格式就是将数据封装在外面。

经过封装字典后：

详情代码：CZAppInfo.h

////  CZAppInfo.h//  A02-应用管理////  Created by Apple on 14/12/12.//  Copyright (c) 2014年 itcast. All rights reserved.//#import <Foundation/Foundation.h>@interface CZAppInfo : NSObject@property (nonatomic,copy) NSString *name;@property (nonatomic,copy) NSString *icon;-(instancetype) initWithDict:(NSDictionary *)dict;+(instancetype) appInfoDict:(NSDictionary *)dict;+(NSArray *)appInfoList;@end

详情代码：CZAppInfo.m

////  CZAppInfo.m//  A02-应用管理////  Created by Apple on 14/12/12.//  Copyright (c) 2014年 itcast. All rights reserved.//#import "CZAppInfo.h"@implementation CZAppInfo-(instancetype) initWithDict:(NSDictionary *)dict{    if (self == [super init]) {        self.name = dict[@"name"];        self.icon = dict[@"icon"];    }    return self;}+(instancetype) appInfoDict:(NSDictionary *)dict{    return [[self alloc]initWithDict:dict];}+(NSArray *)appInfoList{    //1.1 bundle    NSBundle *bundle = [NSBundle mainBundle];    //1.2 获取plist的路径    NSString *path = [bundle pathForResource:@"app" ofType:@"plist"];    //1.3 加载plist    NSArray *dicArray = [NSArray arrayWithContentsOfFile:path];        NSMutableArray *tmpArray = [NSMutableArray array];    //1.4 字典转换模型    for (NSDictionary *dic in dicArray) {        CZAppInfo *appInfo = [CZAppInfo appInfoDict:dic];        [tmpArray addObject:appInfo];    }        return tmpArray;}@end

详情代码：ViewController.m

////  ViewController.m//  A02-应用管理////  Created by Apple on 14/12/12.//  Copyright (c) 2014年 itcast. All rights reserved.//#import "ViewController.h"#import "CZAppInfo.h"@interface ViewController ()//存储从plist中获取的数据@property (nonatomic, strong) NSArray *appInfos;@end@implementation ViewController//1 懒加载- (NSArray *)appInfos{    if (_appInfos == nil) {        _appInfos = [CZAppInfo appInfoList];    }    return _appInfos;}- (void)viewDidLoad {    [super viewDidLoad];    // Do any additional setup after loading the view, typically from a nib.//    NSLog(@"%@",NSHomeDirectory());        //2 测试数据//    NSLog(@"%@",self.appInfos);            CGFloat subViewW = 100;    CGFloat subViewH = 100;    //        子view的横向间距  =  (父view的宽度- 3 * 子view的宽度) / 4    CGFloat marginX = (self.view.frame.size.width - 3 * subViewW) / 4;    //        子view的纵向间距 =  20    CGFloat marginY = 20;        //3 动态生成9宫格的方块    for (int i = 0; i < self.appInfos.count; i++) {        //动态生成view        UIView *subView = [[UIView alloc] init];        [self.view addSubview:subView];                //计算frame      //        当前子view的行号 = 当前遍历到得索引值 / 总列数        int row = i / 3;//        当前子view的列号 = 当前遍历到得索引值 % 总列数        int column = i % 3;//        //        子view横坐标的公式 =  子view的横向间距  +  列号 * (子view的横向间距+ 子view的宽度)        CGFloat subViewX = marginX + column * (marginX + subViewW);//        子view纵坐标的公式 = 20 + 行号 * (子view的纵向间距+ 子view的高度)        CGFloat subViewY = 30 + row * (marginY + subViewH);                subView.frame = CGRectMake(subViewX, subViewY, subViewW, subViewH);//        subView.backgroundColor = [UIColor redColor];                        //取得当前遍历到得数据        CZAppInfo *appInfo = self.appInfos[i];        //        appInfo[@"name"]//        appInfo[@"icon"];                        [self displayAppInfo:appInfo subView:subView];            }}//方法的功能 生成三个子控件，显示应用信息//方法的返回值//方法的参数//方法内部的代码- (void)displayAppInfo:(CZAppInfo *)appInfo subView:(UIView *)subView{    CGFloat subViewW = subView.frame.size.width;    //4 生成3个子控件    //4.1 iconView    UIImageView *iconView = [[UIImageView alloc] init];        iconView.image = [UIImage imageNamed:appInfo.icon];    [subView addSubview:iconView];    //计算frame    CGFloat iconW = 60;    CGFloat iconH = 60;    CGFloat iconY = 0;    CGFloat iconX = (subViewW - iconW) / 2;    iconView.frame = CGRectMake(iconX, iconY, iconW, iconH);        //4.2 nameView    UILabel *nameView = [[UILabel alloc] init];    [subView addSubview:nameView];        //计算frame    CGFloat nameW = subViewW;    CGFloat nameH = 20;    CGFloat nameX = 0;    CGFloat nameY = iconH;    nameView.frame = CGRectMake(nameX, nameY, nameW, nameH);    //    nameView.text = appInfo.name;    //文字大小    nameView.font = [UIFont systemFontOfSize:15];    //文字居中    nameView.textAlignment = NSTextAlignmentCenter;    //    //        nameView.numberOfLines;        //4.3 下载按钮    UIButton *downloadView = [UIButton buttonWithType:UIButtonTypeCustom];    [subView addSubview:downloadView];    //计算frame    CGFloat downloadW = iconW;    CGFloat downloadH = 20;    CGFloat downloadX = iconX;    //获得label的最大y值    CGFloat downloadY = CGRectGetMaxY(nameView.frame);    downloadView.frame = CGRectMake(downloadX, downloadY, downloadW, downloadH);        [downloadView setTitle:@"下载" forState:UIControlStateNormal];        [downloadView setBackgroundImage:[UIImage imageNamed:@"buttongreen"] forState:UIControlStateNormal];    [downloadView setBackgroundImage:[UIImage imageNamed:@"buttongreen_highlighted"] forState:UIControlStateHighlighted];    //设置按钮文字的大小    downloadView.titleLabel.font = [UIFont systemFontOfSize:15];    //给按钮注册事件    [downloadView addTarget:self action:@selector(downloadClick) forControlEvents:UIControlEventTouchUpInside];    //    downloadView.tag = i;}- (void)downloadClick{    NSLog(@"==");}@end