九宫格实现

九宫格的实现

//

// MJViewController.m

// 01-应用管理

//

// Created by apple on 14-3-26.

// Copyright (c) 2014年 itcast. All rights reserved.

//

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

@interface MJViewController ()
/** 存放应用信息 */
@property (nonatomic, strong) NSArray *apps;
@end

@implementation MJViewController

- (void)viewDidLoad
{
[super viewDidLoad];

// 添加应用信息

// 0.总列数(一行最多3列)
int totalColumns = 3;

// 1.应用的尺寸
CGFloat appW = 85;
CGFloat appH = 90;

// 2.间隙 = (控制器view的宽度 - 3 * 应用宽度) / 4
CGFloat marginX = (self.view.frame.size.width - totalColumns * appW) / (totalColumns + 1);
CGFloat marginY = 15;

// 3.根据应用个数创建对应的框框(index 0 ~ 11)
for (int index = 0; index<self.apps.count; index++) {
// 3.1.创建1小框框
UIView *appView = [[UIView alloc] init];
// 设置背景色
//        appView.backgroundColor = [UIColor redColor];

// 3.2.计算框框的位置
// 计算行号和列号
int row = index / totalColumns;
int col = index % totalColumns;
// 计算x和y
CGFloat appX = marginX + col * (appW + marginX);
CGFloat appY = 30 + row * (appH + marginY);
// 设置frame
appView.frame = CGRectMake(appX, appY, appW, appH);

// 3.3.添加框框到控制器的view
[self.view addSubview:appView];

// 3.4.添加内部的小控件
// 3.4.0.index位置对应的应用信息
MJApp *appInfo = self.apps[index];

// 3.4.1.添加图片
UIImageView *iconView = [[UIImageView alloc] init];
// 设置位置
CGFloat iconW = 45;
CGFloat iconH = 45;
CGFloat iconX = (appW - iconW) * 0.5;
CGFloat iconY = 0;
iconView.frame = CGRectMake(iconX, iconY, iconW, iconH);
// 设置图片
iconView.image = [UIImage imageNamed:appInfo.icon];
[appView addSubview:iconView];

// 3.4.2.添加名字
UILabel *nameLabel = [[UILabel alloc] init];
// 设置位置
CGFloat nameW = appW;
CGFloat nameH = 20;
CGFloat nameX = 0;
CGFloat nameY = iconY + iconH;
nameLabel.frame = CGRectMake(nameX, nameY, nameW, nameH);
// 设置文字
nameLabel.text = appInfo.name;
// 设置字体
nameLabel.font = [UIFont systemFontOfSize:13];
// 设置文字居中对齐
nameLabel.textAlignment = NSTextAlignmentCenter;
[appView addSubview:nameLabel];

// 3.4.3.添加下载按钮
UIButton *downloadBtn = [[UIButton alloc] init];
// 设置位置
CGFloat downloadX = 12;
CGFloat downloadY = nameY + nameH;
CGFloat downloadW = appW - 2 * downloadX;
CGFloat downloadH = 20;
downloadBtn.frame = CGRectMake(downloadX, downloadY, downloadW, downloadH);
// 设置默认的背景
UIImage *normalImage = [UIImage imageNamed:@"buttongreen"];
[downloadBtn setBackgroundImage:normalImage forState:UIControlStateNormal];
// 设置高亮的背景
UIImage *highImage = [UIImage imageNamed:@"buttongreen_highlighted"];
[downloadBtn setBackgroundImage:highImage forState:UIControlStateHighlighted];
// 设置按钮的文字
[downloadBtn setTitle:@"下载" forState:UIControlStateNormal];
// 不推荐直接拿到按钮内部的label设置文字
//        downloadBtn.titleLabel.text = @"5435345345";
// 设置按钮文字的字体
downloadBtn.titleLabel.font = [UIFont systemFontOfSize:13];
[appView addSubview:downloadBtn];
}
}

- (NSArray *)apps
{
if (_apps == nil) {
// 初始化

// 1.获得plist的全路径
NSString *path = [[NSBundle mainBundle] pathForResource:@"app.plist" ofType:nil];

// 2.加载数组
NSArray *dictArray = [NSArray arrayWithContentsOfFile:path];

// 3.将dictArray里面的所有字典转成模型对象,放到新的数组中
NSMutableArray *appArray = [NSMutableArray array];
for (NSDictionary *dict in dictArray) {
// 3.1.创建模型对象
//            MJApp *app = [[MJApp alloc] initWithDict:dict];
MJApp *app = [MJApp appWithDict:dict];

// 3.2.添加模型对象到数组中
[appArray addObject:app];
}

// 4.赋值
_apps = appArray;
}
return _apps;
}
@end