应用管理（app九宫格）

动态实现app的九宫格。
首先把素材拷进来，图片放在Assets.xcassets里，plist文件放进Supporting Files里面。不多说上代码。

//  ViewController.h
//  appList
//
//  Created by 袁跃 on 16/4/28.
//  Copyright © 2016年 iflytek. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController

@end

//  ViewController.m
//  appList
//
//  Created by 袁跃 on 16/4/28.
//  Copyright © 2016年 iflytek. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@property(nonatomic, strong) NSArray *apps;
@end

@implementation ViewController
//重写get方法，进行懒加载数据
- (NSArray *)apps{
    if (_apps ==nil) {
        NSString *path = [[NSBundle mainBundle] pathForResource:@"app.plist" ofType:nil];
        _apps = [NSArray arrayWithContentsOfFile:path];
    }
    return _apps;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    
    int cloumns = 3;
    CGFloat viewWidth  = self.view.frame.size.width;
    CGFloat appW = 75;
    CGFloat appH = 90;
    CGFloat marginTop = 30;
    CGFloat marginX = (viewWidth-cloumns*appW)/(cloumns+1);
    CGFloat marginY = marginX;
    
    for (int i=0; i<self.apps.count; i++) {
        
        NSDictionary *appDict = self.apps[i];
        //创建UIView
        UIView *appView = [[UIView alloc]init];
        
        //设置appview的属性
        //appView.backgroundColor = [UIColor redColor];
        CGFloat appX = marginX+((i%cloumns)*(appW+marginX));
        CGFloat appY = marginTop+ ((i/cloumns)*(appH+marginY));
        appView.frame = CGRectMake(appX, appY, appW, appH);
        
        [self.view addSubview:appView];
        UIImageView *appIcon = [[UIImageView alloc]init];
        CGFloat appIconW = 45;
        CGFloat appIconH = 45;
        CGFloat appIconX = (appView.frame.size.width-appIconW)/2;
        CGFloat appIconY = 0;
        appIcon.frame = CGRectMake(appIconX, appIconY, appIconW, appIconH);
        [appView addSubview:appIcon];
        appIcon.image = [UIImage imageNamed:appDict[@"icon"]];
        
        UILabel *labName = [[UILabel alloc]init];
        CGFloat appLabW = appView.frame.size.width;
        CGFloat appLabH = 20;
        CGFloat appLabX = 0;
        CGFloat appLabY = appIconH;
        
        labName.frame = CGRectMake(appLabX, appLabY, appLabW, appLabH);
        labName.text = appDict[@"name"];
        labName.font = [UIFont systemFontOfSize:12];
        labName.textAlignment = NSTextAlignmentCenter;
        
        [appView addSubview:labName];
        
        UIButton *appButton = [[UIButton alloc]init];
        CGFloat appButtonX = appIconX;
        CGFloat appButtonY = CGRectGetMaxY(labName.frame);
        CGFloat appButtonW = appIconW;
        CGFloat appButtonH = 20;
        
        appButton.frame = CGRectMake(appButtonX, appButtonY, appButtonW, appButtonH);
        [appButton setTitle:@"下载" forState:UIControlStateNormal];
        [appButton setTitle:@"已下载" forState:UIControlStateDisabled];
        [appButton setBackgroundImage:[UIImage imageNamed:@"buttongreen"]forState:UIControlStateNormal];
        [appButton setBackgroundImage:[UIImage imageNamed:@"buttongreen_highted"]forState:UIControlStateHighlighted];
        appButton.titleLabel.font = [UIFont systemFontOfSize:12];
        
        [appButton addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];
        
        [appView addSubview:appButton];
        
    }
    self.view.backgroundColor = [UIColor whiteColor];
    
    
    
    
}
-(void)buttonClick{
    NSLog(@"正在下载");
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end