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：
1 //
2 // YYViewController.m
3 // 10-xib文件的使用
4 //
5 // Created by apple on 14-5-24.
6 // Copyright (c) 2014年 itcase. All rights reserved.
7 //
8
9 #import "YYViewController.h"
10 #import "YYapp.h"
11
12 @interface YYViewController ()
13 @property(nonatomic,strong)NSArray *app;
14 @end
15
16 @implementation YYViewController
17
18 //1.加载数据信息
19 -(NSArray *)app
20 {
21 if (!_app) {
22 NSString *path=[[NSBundle mainBundle]pathForResource:@"app.plist" ofType:nil];
23 NSArray *temparray=[NSArray arrayWithContentsOfFile:path];
24
25 //字典转模型
26 NSMutableArray *arrayM=[NSMutableArray array ];
27 for (NSDictionary *dict in temparray) {
28 [arrayM addObject:[YYapp appWithDict:dict]];
29 }
30 _app=arrayM;
31 }
32 return _app;
33 }
34
35 //创建界面原型
36 - (void)viewDidLoad
37 {
38 [super viewDidLoad];
39 NSLog(@"%d",self.app.count);
40
41 //九宫格布局
42 int totalloc=3;
43 CGFloat appviewW=80;
44 CGFloat appviewH=90;
45 CGFloat margin=(self.view.frame.size.width-totalloc*appviewW)/(totalloc+1);
46
47 int count=self.app.count;
48 for (int i=0; i<count; i++) {
49
50 int row=i/totalloc;
51 int loc=i%totalloc;
52 CGFloat appviewX=margin + (margin +appviewW)*loc;
53 CGFloat appviewY=margin + (margin +appviewH)*row;
54 YYapp *app=self.app[i];
55
56 //拿出xib视图
57 NSArray *apparray= [[NSBundle mainBundle]loadNibNamed:@"appxib" owner:nil options:nil];
58 UIView *appview=[apparray firstObject];
59 //加载视图
60 appview.frame=CGRectMake(appviewX, appviewY, appviewW, appviewH);
61
62 UIImageView *appviewImg=(UIImageView *)[appview viewWithTag:1];
63 appviewImg.image=app.image;
64
65 UILabel *appviewlab=(UILabel *)[appview viewWithTag:2];
66 appviewlab.text=app.name;
67
68 UIButton *appviewbtn=(UIButton *)[appview viewWithTag:3];
69 [appviewbtn addTarget:self action:@selector(appviewbtnClick:) forControlEvents:UIControlEventTouchUpInside];
70 appviewbtn.tag=i;
71
72 [self.view addSubview:appview];
73 }
74 }
75
76 /**按钮的点击事件*/
77 -(void)appviewbtnClick:(UIButton *)btn
78 {
79 YYapp *apps=self.app[btn.tag];
80 UILabel *showlab=[[UILabel alloc]initWithFrame:CGRectMake(60, 450, 200, 20)];
81 [showlab setText:[NSString stringWithFormat: @"%@下载成功",apps.name]];
82 [showlab setBackgroundColor:[UIColor lightGrayColor]];
83 [self.view addSubview:showlab];
84 showlab.alpha=1.0;
85
86 //简单的动画效果
87 [UIView animateWithDuration:2.0 animations:^{
88 showlab.alpha=0;
89 } completion:^(BOOL finished) {
90 [showlab removeFromSuperview];
91 }];
92 }
93
94 @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