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：