iPhone开发之.plist文件的创建于使用—— 代码案例 （ 图片浏览器的创建）

//
//  ViewController.h
//  plist文件的使用之图片浏览器
//
//  Created by apple on 15/8/30.
//  Copyright (c) 2015年 LiuXun. All rights reserved.
//#import <UIKit/UIKit.h>@interface ViewController : UIViewController
@property (nonatomic, strong) NSArray * pic;
@property (nonatomic, assign ) int index;
@property (nonatomic, strong) UIButton *  btnNext;
@property (nonatomic, strong) UIButton *btnPre;
@property (nonatomic, strong) UIImageView * icon;
@property(nonatomic, strong) UILabel * lblNum;
@property (nonatomic, strong) UILabel * lblTitle;-(void)next;  // 下一张按钮的监听方法-(void)pre;  // 上一张按钮的监听方法
@end

//
//  ViewController.m
//  plist文件的使用之图片浏览器
//
//  Created by apple on 15/8/30.
//  Copyright (c) 2015年 LiuXun. All rights reserved.
//#import "ViewController.h"
#define   WIDTH     [UIScreen mainScreen].bounds.size.width
#define   HEIGHT   [UIScreen mainScreen].bounds.size.height@interface ViewController ()@end@implementation ViewController- (void)viewDidLoad
{[super viewDidLoad];// 设置上方张数标题self.lblNum = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, WIDTH, WIDTH/5)];[self.view addSubview:self.lblNum];// 设置上一张图片的按钮self.btnPre = [[UIButton alloc] initWithFrame:CGRectMake(0, WIDTH/5+WIDTH/4, WIDTH/5, WIDTH/5)];[self.btnPre setBackgroundImage:[UIImage imageNamed:@"left_normal"] forState:UIControlStateNormal]; // 设置正常状态下的背景图片[self.btnPre setBackgroundImage:[UIImage imageNamed:@"left_highlighted"] forState:UIControlStateHighlighted]; // 设置按下后的背景图片[self.btnPre setBackgroundImage:[UIImage imageNamed:@"left_disable.png"] forState:UIControlStateDisabled];  // 设置禁用后的背景图片// 设置监听方法[self.btnPre addTarget:self action:@selector(pre) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:self.btnPre];//设置下一张图片的 按钮self.btnNext = [[UIButton alloc] initWithFrame:CGRectMake(0.8*WIDTH, WIDTH/5+WIDTH/4, WIDTH/5, WIDTH/5)];[self.btnNext setBackgroundImage:[UIImage imageNamed:@"right_normal"] forState:UIControlStateNormal];[self.btnNext setBackgroundImage:[UIImage imageNamed:@"right_highlighted"] forState:UIControlStateHighlighted];[self.btnNext setBackgroundImage:[UIImage imageNamed:@"right_disable"] forState:UIControlStateDisabled];[self.btnNext addTarget:self action:@selector(next) forControlEvents:UIControlEventTouchUpInside];[self.view addSubview:self.btnNext];//  设置显示图片的ImageViewself.icon = [[UIImageView alloc] initWithFrame:CGRectMake(WIDTH/5, WIDTH/5, 0.6*WIDTH, 0.6*WIDTH)];[self.view addSubview:self.icon];// 设置标题显示Label属性self.lblTitle = [[UILabel alloc] initWithFrame:CGRectMake(0, WIDTH, WIDTH, WIDTH/5)];[self.view addSubview:self.lblTitle];self.index = -1;[self next];
}// 重写数组的get方法来实现懒加载
-(NSArray *)pic
{if (_pic  == nil) {// 在app安装根目录下寻找指定plist文件的路径NSString *path = [[NSBundle mainBundle] pathForResource:@"images" ofType:@".plist"];// 从plist文件中读取内容到一个新的字典中NSArray *newArray = [NSArray arrayWithContentsOfFile:path];_pic = newArray;   // 变量赋值}return _pic;
}- (void)didReceiveMemoryWarning
{[super didReceiveMemoryWarning];}
-(void)next // 下一张按钮的监听方法
{NSLog(@"下一张");_index ++;[self setData];
}
-(void)pre  // 上一张按钮的监听方法
{NSLog(@"上一张");_index--;[self  setData];
}
-(void)setData
{NSDictionary *dict = self.pic[self.index];  // 从文件中读出的数组中取出当前索引的字典self.lblNum.text = [NSString stringWithFormat:@"%d/%d",self.index+1,self.pic.count];[self.lblNum setTextAlignment:NSTextAlignmentCenter];  // 设置字体居中self.lblTitle.text = [NSString stringWithFormat:@"%@",dict[@"desc"]]; // 从字典中取出内容设置组件[self.lblTitle setTextAlignment:NSTextAlignmentCenter];self.icon.image = [UIImage imageNamed:dict[@"icon"]];//   每次点击都判断并设置两个按钮的禁用与启用状态self.btnNext.enabled = (self.index != (self.pic.count-1));self.btnPre.enabled = (self.index != 0);
}
@end