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OS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：
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原文地址：http://www.cnblogs.com/zhuyiios/p/4616291.html
