iOS中纯手工图片浏览器

#import "ViewController.h"
//纯手工打造
@interface ViewController ()

@property (weak, nonatomic)  UIButton *leftUpBtn;
@property (weak, nonatomic)  UIButton *rightNextBtn;

@property (weak, nonatomic)  UIImageView *imageShow;
@property (weak, nonatomic)  UILabel *labNum1;
@property (weak, nonatomic)  UILabel *LabChinese1;
@property (nonatomic, assign) int index;
@property (nonatomic, strong) NSArray *arrayStrAndShow;
@end
#define CHTIcon @"icon"
#define CHTDesc @"desc"
@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
  //创建一个左Button对象
    UIButton *btnzuo = [[UIButton alloc] init];
    
    //添加按钮
    [self.view addSubview:btnzuo];
    
    //给按钮设置宽高
    btnzuo.frame = CGRectMake(29, 169, 30, 30);
    
    //给按钮设置图片
    UIImage *noImage = [UIImage imageNamed:@"left_normal"];
    [btnzuo setBackgroundImage:noImage forState:UIControlStateNormal];
    UIImage *hiImage = [UIImage imageNamed:@"left_highlighted"];
    [btnzuo setBackgroundImage:hiImage forState:UIControlStateHighlighted];
    self.leftUpBtn = btnzuo;
    //创建一个右Button对象
    UIButton *btnyou = [[UIButton alloc] init];
    
    //添加按钮
    [self.view addSubview:btnyou];
    
    //给按钮设置宽高
    btnyou.frame = CGRectMake(309, 169, 30, 30);
    
    //给按钮设置图片
    UIImage *noImage1 = [UIImage imageNamed:@"right_normal"];
    [btnyou setBackgroundImage:noImage1 forState:UIControlStateNormal];
    UIImage *hiImage1 = [UIImage imageNamed:@"right_highlighted"];
    [btnyou setBackgroundImage:hiImage1 forState:UIControlStateHighlighted];
    self.rightNextBtn = btnyou;
    //创建UIImageView
    UIImageView *imageview = [[UIImageView alloc] init];
    //向view中添加iamgeview
    [self.view addSubview:imageview];
    //给iamgeview设置位置和宽高
    imageview.frame = CGRectMake(96, 94, 180, 180);
    
    imageview.image = [UIImage imageNamed:@"1"];
    self.imageShow = imageview;
    //创建俩个lable对象
    UILabel *labNum = [[UILabel alloc] init];
    //把lable添加到view中
    [self.view addSubview:labNum];
    labNum.frame = CGRectMake(96, 48, 180, 38);
    labNum.text=@"2/5";
    labNum.textAlignment = NSTextAlignmentCenter;
    UILabel *labChinese = [[UILabel alloc] init];
    self.labNum1 = labNum;
    //把lable添加到view中
    [self.view addSubview:labChinese];
    labChinese.frame = CGRectMake(61, 320, 278, 76);
    labChinese.text=@"有啥牛逼的";
    labChinese.textAlignment = NSTextAlignmentCenter;
    self.LabChinese1 = labChinese;
    //给两个btn添加事件
    [btnzuo addTarget:self action:@selector(btnLeft) forControlEvents:UIControlEventTouchUpInside];
    [btnyou addTarget:self action:@selector(btnRight) forControlEvents:UIControlEventTouchUpInside];
    NSBundle *bundle = [NSBundle mainBundle];
    //获取DataImagePlist的全路径
    NSString *path = [bundle pathForResource:@"DataImagePlist" ofType:@"plist"];
    
    self.arrayStrAndShow = [NSArray arrayWithContentsOfFile:path];
    
    self.index = -1;
    [self btnRight];
}

- (void)changeData
{
    //获取字典
    NSDictionary *dic = self.arrayStrAndShow[self.index];
    self.imageShow.image = [UIImage imageNamed:dic[CHTIcon]];
    unsigned long count1 = self.arrayStrAndShow.count;
    NSString *str = [NSString stringWithFormat:@"%d / %lu",self.index + 1, count1];
    self.labNum1.text = str;
    
    self.LabChinese1.text = dic[CHTDesc];
    
    self.leftUpBtn.enabled = (self.index != 0);
    self.rightNextBtn.enabled = (self.index != (count1 - 1));
}


- (void)btnLeft
{
    self.index--;
    [self changeData];
}
- (void)btnRight
{
    self.index++;
    [self changeData];
}
@end