iOS开发UI篇—xib的简单使用

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