iOS开发UI篇章之 九宫格坐标计算

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：