iOS开发实现图片浏览功能

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *topLabel;
@property (weak, nonatomic) IBOutlet UILabel *descLabel;
@property (weak, nonatomic) IBOutlet UIButton *leftBtn;
@property (weak, nonatomic) IBOutlet UIButton *rightBtn;
@property (weak, nonatomic) IBOutlet UIImageView *imageView;

@property (nonatomic, assign) int index;

@property (nonatomic, strong) NSArray *imageDicts;

@end

@implementation ViewController

- (NSArray *)imageDicts
{
? ? if (!_imageDicts) {

? ? ? ? NSString *path = [[NSBundle mainBundle] pathForResource:@"imageDate.plist" ofType:nil];
? ? ? ? _imageDicts = [NSArray arrayWithContentsOfFile:path];
? ? }
? ? return _imageDicts;
}

- (IBAction)leftBtnOnClick:(UIButton *)sender {
? ? self.index --;

? ? [self btnClickChange];

}
- (IBAction)rightBtnOnClick:(id)sender {
? ? self.index ++;

? ? [self btnClickChange];
}

- (void)btnClickChange
{
? ? self.topLabel.text = [NSString stringWithFormat:@"%d/%d", (self.index + 1), self.imageDicts.count];


? ? self.descLabel.text = self.imageDicts[self.index][@"description"];

? ? self.imageView.image = [UIImage imageNamed:self.imageDicts[self.index][@"name"]];

? ? self.leftBtn.enabled = (self.index != 0);
? ? self.rightBtn.enabled = (self.index != 4);
}

- (void)viewDidLoad {
? ? [super viewDidLoad];
? ? // Do any additional setup after loading the view, typically from a nib.
}

- (void)didReceiveMemoryWarning {
? ? [super didReceiveMemoryWarning];
? ? // Dispose of any resources that can be recreated.
}

@end