iOS开发UI篇—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

 //
 //  YYViewController.m
 //  九宫格练习
 //
 //  Created by 孔医己 on 14-5-22.
 //  Copyright (c) 2014年 itcast. All rights reserved.
 //

 #import "YYViewController.h"

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

 @implementation YYViewController

 //1.加载数据
 - (NSArray *)apps
 {
     if (!_apps) {
         NSString *path=[[NSBundle mainBundle]pathForResource:@"app.plist" ofType:nil];
         _apps=[NSArray arrayWithContentsOfFile:path];
     }
     return _apps;
 }

 - (void)viewDidLoad
 {
     [super viewDidLoad];
     NSLog(@"%d",self.apps.count);

     //2.完成布局设计

     //三列
     int totalloc=;
     CGFloat appvieww=;
     CGFloat appviewh=;

     CGFloat margin=(self.view.frame.size.width-totalloc*appvieww)/(totalloc+);
     int count=self.apps.count;
     for (int i=; i<count; i++) {
         int row=i/totalloc;//行号
         //1/3=0,2/3=0,3/3=1;
         int loc=i%totalloc;//列号

         CGFloat appviewx=margin+(margin+appvieww)*loc;
         CGFloat appviewy=margin+(margin+appviewh)*row;

         //创建uiview控件
         UIView *appview=[[UIView alloc]initWithFrame:CGRectMake(appviewx, appviewy, appvieww, appviewh)];
         //[appview setBackgroundColor:[UIColor purpleColor]];
         [self.view addSubview:appview];

         //创建uiview控件中的子视图
         UIImageView *appimageview=[[UIImageView alloc]initWithFrame:CGRectMake(, , , )];
         UIImage *appimage=[UIImage imageNamed:self.apps[i][@"icon"]];
         appimageview.image=appimage;
         [appimageview setContentMode:UIViewContentModeScaleAspectFit];
        // NSLog(@"%@",self.apps[i][@"icon"]);
         [appview addSubview:appimageview];

         //创建文本标签
         UILabel *applable=[[UILabel alloc]initWithFrame:CGRectMake(, , , )];
         [applable setText:self.apps[i][@"name"]];
         [applable setTextAlignment:NSTextAlignmentCenter];
         [applable setFont:[UIFont systemFontOfSize:12.0]];
         [appview addSubview:applable];

         //创建按钮
         UIButton *appbtn=[UIButton buttonWithType:UIButtonTypeCustom];
         appbtn.frame= CGRectMake(, , , );
         [appbtn setBackgroundImage:[UIImage imageNamed:@"buttongreen"] forState:UIControlStateNormal];
         [appbtn setBackgroundImage:[UIImage imageNamed:@"buttongreen_highlighted"] forState:UIControlStateHighlighted];
         [appbtn setTitle:@"下载" forState:UIControlStateNormal];
         appbtn.titleLabel.font=[UIFont systemFontOfSize:12.0];
         [appview addSubview:appbtn];

         [appbtn addTarget:self action:@selector(click) forControlEvents:UIControlEventTouchUpInside];
     }

 }

 -(void)click
 {
     //动画标签
     UILabel *animalab=[[UILabel alloc]initWithFrame:CGRectMake(self.view.center.x-, self.view.center.y+, , )];
     [animalab setText:@"下载成功"];
     animalab.font=[UIFont systemFontOfSize:12.0];
     [animalab setBackgroundColor:[UIColor brownColor]];
     [animalab setAlpha:];
     [self.view addSubview:animalab];

 //    [UIView beginAnimations:Nil context:Nil];
 //    [animalab setAlpha:1];
 //    [UIView setAnimationDuration:4.0];
 //    [UIView commitAnimations];

     //执行完之后，还得把这给删除了，推荐使用block动画

     [UIView animateWithDuration:4.0 animations:^{
     [animalab setAlpha:];
     } completion:^(BOOL finished) {
         //[self.view re];
     }];
 }

 - (void)didReceiveMemoryWarning
 {
     [super didReceiveMemoryWarning];
 }

 @end

执行效果：