iOS開發UI篇—九宮格座標計算

iOS開發UI篇—九宮格座標計算

1、要求

完成下面的佈局

 

2、分析

尋找左邊的規律，每個uiview的x座標和y座標。

3、實現思路

 

(1)明確每一塊用得是什麼view

(2)明確每一個view之間的父子關係，每一個視圖都只有一個父視圖，擁有不少的子視圖。

(3)能夠先嚐試逐個的添加格子，最後考慮使用for循環，完成全部uiview的建立

(4)加載app數據，根據數據長度建立對應個數的格子

(5)添加格子內部的子控件

(6)給內部的子控件裝配數據

4、代碼示例

//
// YYViewController.m
// 九宮格練習
//
// Created by 孔醫己 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.加載數據
- (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.完成佈局設計

//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;//行號
//1/3=0,2/3=0,3/3=1;
int loc=i%totalloc;//列號

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


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


//建立uiview控件中的子視圖
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];

//建立文本標籤
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];

//建立按鈕
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:@"下載" forState:UIControlStateNormal];
appbtn.titleLabel.font=[UIFont systemFontOfSize:12.0];
[appview addSubview:appbtn];

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

}

-(void)click
{
//動畫標籤
UILabel *animalab=[[UILabel alloc]initWithFrame:CGRectMake(self.view.center.x-100, self.view.center.y+20, 200, 40)];
[animalab setText:@"下載成功"];
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];

//執行完以後，還得把這給刪除了，推薦使用block動畫

[UIView animateWithDuration:4.0 animations:^{
[animalab setAlpha:1];
} completion:^(BOOL finished) {
//[self.view re];
}];
}

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

@end

執行效果：