iOS-图片浏览器(字典和plist文件的使用)

//

//  ViewController.m

//  19-图片浏览器

//

//  Created by hongqiangli on 2017/7/31.

//  Copyright © 2017年 李洪强. All rights reserved.

//

#define icon @"icon"

#define desc @"desc"

#import "ViewController.h"

@interface ViewController ()

/**

 记录当前的索引号

 */

@property(nonatomic,assign)int index;

/**

 上一张

 */

- (IBAction)previous;

/**

 下一张

 */

- (IBAction)next;

/**

 描述

 */

@property (weak, nonatomic) IBOutlet UILabel *descLabel;

/**

 上一个按钮

 */

@property (weak, nonatomic) IBOutlet UIButton *previousBtn;

/**

 下一个按钮

 */

@property (weak, nonatomic) IBOutlet UIButton *nextBtn;

/**

 索引label

 */

@property (weak, nonatomic) IBOutlet UILabel *noLabel;

@property (weak, nonatomic) IBOutlet UIImageView *mainImageView;

/**

 一般的OC对象用strong修饰

 */

@property(nonatomic,strong)NSArray *images;

@end

@implementation ViewController

- (NSArray *)images{

    if(_images == nil){

        //字典的方式初始化

//        NSMutableDictionary *dic1 = [NSMutableDictionary dictionary];

//        dic1[icon] = @"biaoqingdi";

//        dic1[desc] = @"在他面前，其他神马表情都弱爆了！";

//        NSMutableDictionary *dict2 = [NSMutableDictionary dictionary];

//        dict2[icon]=  @"wangba" ;

//        dict2[desc] = @"哥们为什么选八号呢";

//        NSMutableDictionary *dict3 = [NSMutableDictionary dictionary];

//        dict3[icon]=  @"bingli" ;

//        dict3[desc] = @"这也忒狠了！";

//        NSMutableDictionary *dict4 = [NSMutableDictionary dictionary];

//        dict4[icon]=  @"chiniupa" ;

//        dict4[desc] = @"这小姑娘吃个牛排比杀牛还费劲啊";

//        NSMutableDictionary *dict5 = [NSMutableDictionary dictionary];

//        dict5[icon]=  @"danteng" ;

//        dict5[desc] = @"亲，你能改下你的网名么？哈哈";

//        _images = @[dic1,dict2,dict3,dict4,dict5];

        //用plist的方式加载

        //拿到plist文件的全路径

        NSString *path = [[NSBundle mainBundle]pathForResource:@"images" ofType:@"plist"];

        _images = [NSArray arrayWithContentsOfFile:path];

    }

    return _images;

}

- (void)viewDidLoad {

    [super viewDidLoad];

    [self changData];

}

/**

 点击上一张

 */

- (IBAction)previous {

    _index--;

    [self changData];

}

/**

 下一张

 */

- (IBAction)next {

    _index++;

    [self changData];

}

- (void)changData{

    _noLabel.text = [NSString stringWithFormat:@"%d/%ld",_index + 1,_images.count];

    NSDictionary *dict = _images[_index];

    NSString *iconStr = dict[icon];

    NSString *descStr = dict[desc];

    _mainImageView.image = [UIImage imageNamed:iconStr];

    _descLabel.text = descStr;

    //判断按钮能不能点击

    _previousBtn.enabled = (_index != 0);

    _nextBtn.enabled = (_index != 4);

}

@end