iOS开发UI篇—xib的简单使用

一、简单介绍

xib和storyboard的比较，一个轻量级一个重量级。

共同点：

都用来描述软件界面

都用Interface Builder工具来编辑

不同点:

Xib是轻量级的，用来描述局部的UI界面

Storyboard是重量级的，用来描述整个软件的多个界面，并且能展示多个界面之间的跳转关系

二、xib的简单使用

1.建立xib文件

建立的xib文件命名为appxib.xib

2.对xib进行设置

　　根据程序的需要，这里把view调整为自由布局

建立view模型（设置长宽等参数）

调整布局和内部的控件

完成后的单个view

3.使用xib文件的代码示例

YYViewController.m文件代码如下：

//
// YYViewController.m
// 10-xib文件的使用
//
// Created by apple on 14-5-24.
// Copyright (c) 2014年 itcase. All rights reserved.
//

#import "YYViewController.h"
#import "YYapp.h"

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

@implementation YYViewController

//1.加载数据信息
-(NSArray *)app
{
 if (!_app) {
 NSString *path=[[NSBundle mainBundle]pathForResource:@"app.plist" ofType:nil];
 NSArray *temparray=[NSArray arrayWithContentsOfFile:path];
 
 //字典转模型
 NSMutableArray *arrayM=[NSMutableArray array ];
 for (NSDictionary *dict in temparray) {
 [arrayM addObject:[YYapp appWithDict:dict]];
 }
 _app=arrayM;
 }
 return _app;
}

//创建界面原型
- (void)viewDidLoad
{
 [super viewDidLoad];
 NSLog(@"%d",self.app.count);
 
 //九宫格布局
 int totalloc=3;
 CGFloat appviewW=80;
 CGFloat appviewH=90;
 CGFloat margin=(self.view.frame.size.width-totalloc*appviewW)/(totalloc+1);
 
 int count=self.app.count;
 for (int i=0; i<count; i++) {
 
 int row=i/totalloc;
 int loc=i%totalloc;
 CGFloat appviewX=margin + (margin +appviewW)*loc;
 CGFloat appviewY=margin + (margin +appviewH)*row;
 YYapp *app=self.app[i];
 
 //拿出xib视图
 NSArray *apparray= [[NSBundle mainBundle]loadNibNamed:@"appxib" owner:nil options:nil];
 UIView *appview=[apparray firstObject];
 //加载视图
 appview.frame=CGRectMake(appviewX, appviewY, appviewW, appviewH);
 
 UIImageView *appviewImg=(UIImageView *)[appview viewWithTag:1];
 appviewImg.image=app.image;
 
 UILabel *appviewlab=(UILabel *)[appview viewWithTag:2];
 appviewlab.text=app.name;
 
 UIButton *appviewbtn=(UIButton *)[appview viewWithTag:3];
 [appviewbtn addTarget:self action:@selector(appviewbtnClick:) forControlEvents:UIControlEventTouchUpInside];
 appviewbtn.tag=i;
 
 [self.view addSubview:appview];
 }
}

/**按钮的点击事件*/
-(void)appviewbtnClick:(UIButton *)btn
{
 YYapp *apps=self.app[btn.tag];
 UILabel *showlab=[[UILabel alloc]initWithFrame:CGRectMake(60, 450, 200, 20)];
 [showlab setText:[NSString stringWithFormat: @"%@下载成功",apps.name]];
 [showlab setBackgroundColor:[UIColor lightGrayColor]];
 [self.view addSubview:showlab];
 showlab.alpha=1.0;
 
 //简单的动画效果
 [UIView animateWithDuration:2.0 animations:^{
 showlab.alpha=0;
 } completion:^(BOOL finished) {
 [showlab removeFromSuperview];
 }];
}

@end

运行效果：

三、对xib进行连线示例

1.连线示例

新建一个xib对应的视图类，继承自Uiview

在xib界面右上角与新建的视图类进行关联

把xib和视图类进行连线

注意：在使用中把weak改成为强引用。否则...

2.连线后的代码示例

YYViewController.m文件代码如下：

//
// YYViewController.m
// 10-xib文件的使用
//
// Created by apple on 14-5-24.
// Copyright (c) 2014年 itcase. All rights reserved.
//

#import "YYViewController.h"
#import "YYapp.h"
#import "YYappview.h"

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

@implementation YYViewController

//1.加载数据信息
-(NSArray *)app
{
 if (!_app) {
 NSString *path=[[NSBundle mainBundle]pathForResource:@"app.plist" ofType:nil];
 NSArray *temparray=[NSArray arrayWithContentsOfFile:path];
 
 //字典转模型
 NSMutableArray *arrayM=[NSMutableArray array ];
 for (NSDictionary *dict in temparray) {
 [arrayM addObject:[YYapp appWithDict:dict]];
 }
 _app=arrayM;
 }
 return _app;
}

//创建界面原型
- (void)viewDidLoad
{
 [super viewDidLoad];
 NSLog(@"%d",self.app.count);
 
 //九宫格布局
 int totalloc=3;
 CGFloat appviewW=80;
 CGFloat appviewH=90;
 CGFloat margin=(self.view.frame.size.width-totalloc*appviewW)/(totalloc+1);
 
 int count=self.app.count;
 for (int i=0; i<count; i++) {
 
 int row=i/totalloc;
 int loc=i%totalloc;
 CGFloat appviewX=margin + (margin +appviewW)*loc;
 CGFloat appviewY=margin + (margin +appviewH)*row;
 YYapp *app=self.app[i];
 
 //拿出xib视图
 NSArray *apparray= [[NSBundle mainBundle]loadNibNamed:@"appxib" owner:nil options:nil];
 
 //注意这里的类型名!
 //UIView *appview=[apparray firstObject];
 YYappview *appview=[apparray firstObject];
 
 //加载视图
 appview.frame=CGRectMake(appviewX, appviewY, appviewW, appviewH);
 [self.view addSubview:appview];
 
 appview.appimg.image=app.image;
 appview.applab.text=app.name;
 appview.appbtn.tag=i;
 
 [ appview.appbtn addTarget:self action:@selector(appviewbtnClick:) forControlEvents:UIControlEventTouchUpInside];
 
 }
}

/**按钮的点击事件*/
-(void)appviewbtnClick:(UIButton *)btn
{
 YYapp *apps=self.app[btn.tag];
 UILabel *showlab=[[UILabel alloc]initWithFrame:CGRectMake(60, 450, 200, 20)];
 [showlab setText:[NSString stringWithFormat: @"%@下载成功",apps.name]];
 [showlab setBackgroundColor:[UIColor lightGrayColor]];
 [self.view addSubview:showlab];
 showlab.alpha=1.0;
 
 //简单的动画效果
 [UIView animateWithDuration:2.0 animations:^{
 showlab.alpha=0;
 } completion:^(BOOL finished) {
 [showlab removeFromSuperview];
 }];
}

@end

YYappview.h文件代码（已经连线）

#import <UIKit/UIKit.h>

@interface YYappview : UIView
@property (strong, nonatomic) IBOutlet UIImageView *appimg;
@property (strong, nonatomic) IBOutlet UILabel *applab;
@property (strong, nonatomic) IBOutlet UIButton *appbtn;
@end