iOS开发UI篇—九宫格坐标计算

一、要求

完成下面的布局

二、分析

寻找左边的规律，每一个uiview的x坐标和y坐标。

三、实现思路

(1)明确每一块用得是什么view

(2)明确每个view之间的父子关系，每个视图都只有一个父视图，拥有很多的子视图。

(3)可以先尝试逐个的添加格子，最后考虑使用for循环，完成所有uiview的创建

(4)加载app数据，根据数据长度创建对应个数的格子

(5)添加格子内部的子控件

(6)给内部的子控件装配数据

四、代码示例

  1 //
  2 //  YYViewController.m
  3 //  九宫格练习
  4 //
  5 //  Created by 孔医己 on 14-5-22.
  6 //  Copyright (c) 2014年 itcast. All rights reserved.
  7 //
  8 
  9 #import "YYViewController.h"
 10 
 11 @interface YYViewController ()
 12 @property(nonatomic,strong)NSArray *apps;
 13 @end
 14 
 15 @implementation YYViewController
 16 
 17 
 18 //1.加载数据
 19 - (NSArray *)apps
 20 {
 21     if (!_apps) {
 22         NSString *path=[[NSBundle mainBundle]pathForResource:@"app.plist" ofType:nil];
 23         _apps=[NSArray arrayWithContentsOfFile:path];
 24     }
 25     return _apps;
 26 }
 27 
 28 - (void)viewDidLoad
 29 {
 30     [super viewDidLoad];
 31     NSLog(@"%d",self.apps.count);
 32     
 33     //2.完成布局设计
 34     
 35     //三列
 36     int totalloc=3;
 37     CGFloat appvieww=80;
 38     CGFloat appviewh=90;
 39     
 40     CGFloat margin=(self.view.frame.size.width-totalloc*appvieww)/(totalloc+1);
 41     int count=self.apps.count;
 42     for (int i=0; i<count; i++) {
 43         int row=i/totalloc;//行号
 44         //1/3=0,2/3=0,3/3=1;
 45         int loc=i%totalloc;//列号
 46         
 47         CGFloat appviewx=margin+(margin+appvieww)*loc;
 48         CGFloat appviewy=margin+(margin+appviewh)*row;
 49         
 50         
 51         //创建uiview控件
 52         UIView *appview=[[UIView alloc]initWithFrame:CGRectMake(appviewx, appviewy, appvieww, appviewh)];
 53         //[appview setBackgroundColor:[UIColor purpleColor]];
 54         [self.view addSubview:appview];
 55         
 56         
 57         //创建uiview控件中的子视图
 58         UIImageView *appimageview=[[UIImageView alloc]initWithFrame:CGRectMake(0, 0, 80, 50)];
 59         UIImage *appimage=[UIImage imageNamed:self.apps[i][@"icon"]];
 60         appimageview.image=appimage;
 61         [appimageview setContentMode:UIViewContentModeScaleAspectFit];
 62        // NSLog(@"%@",self.apps[i][@"icon"]);
 63         [appview addSubview:appimageview];
 64         
 65         //创建文本标签
 66         UILabel *applable=[[UILabel alloc]initWithFrame:CGRectMake(0, 50, 80, 20)];
 67         [applable setText:self.apps[i][@"name"]];
 68         [applable setTextAlignment:NSTextAlignmentCenter];
 69         [applable setFont:[UIFont systemFontOfSize:12.0]];
 70         [appview addSubview:applable];
 71         
 72         //创建按钮
 73         UIButton *appbtn=[UIButton buttonWithType:UIButtonTypeCustom];
 74         appbtn.frame= CGRectMake(10, 70, 60, 20);
 75         [appbtn setBackgroundImage:[UIImage imageNamed:@"buttongreen"] forState:UIControlStateNormal];
 76         [appbtn setBackgroundImage:[UIImage imageNamed:@"buttongreen_highlighted"] forState:UIControlStateHighlighted];
 77         [appbtn setTitle:@"下载" forState:UIControlStateNormal];
 78         appbtn.titleLabel.font=[UIFont systemFontOfSize:12.0];
 79         [appview addSubview:appbtn];
 80         
 81         [appbtn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
 82     }
 83 
 84 }
 85 
 86 -(void)click
 87 {
 88     //动画标签
 89     UILabel *animalab=[[UILabel alloc]initWithFrame:CGRectMake(self.view.center.x-100, self.view.center.y+20, 200, 40)];
 90     [animalab setText:@"下载成功"];
 91     animalab.font=[UIFont systemFontOfSize:12.0];
 92     [animalab setBackgroundColor:[UIColor brownColor]];
 93     [animalab setAlpha:0];
 94     [self.view addSubview:animalab];
 95     
 96 //    [UIView beginAnimations:Nil context:Nil];
 97 //    [animalab setAlpha:1];
 98 //    [UIView setAnimationDuration:4.0];
 99 //    [UIView commitAnimations];
100     
101     //执行完之后，还得把这给删除了，推荐使用block动画
102     
103     [UIView animateWithDuration:4.0 animations:^{
104     [animalab setAlpha:1];
105     } completion:^(BOOL finished) {
106         //[self.view re];
107     }];
108 }
109 
110 - (void)didReceiveMemoryWarning
111 {
112     [super didReceiveMemoryWarning];
113 }
114 
115 @end

执行效果：