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=3;
    CGFloat appvieww=80;
    CGFloat appviewh=90;

    CGFloat margin=(self.view.frame.size.width-totalloc*appvieww)/(totalloc+1);
    int count=self.apps.count;
    for (int i=0; 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(0, 0, 80, 50)];
        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(0, 50, 80, 20)];
        [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(10, 70, 60, 20);
        [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-100, self.view.center.y+20, 200, 40)];
    [animalab setText:@"下载成功"];
    animalab.font=[UIFont systemFontOfSize:12.0];
    [animalab setBackgroundColor:[UIColor brownColor]];
    [animalab setAlpha:0];
    [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:1];
    } completion:^(BOOL finished) {
        //[self.view re];
    }];
}

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

@end

执行效果：