UIImage View 疑问

#import "ViewController.h"
@interface ViewController ()
- (IBAction)drink;
@property (weak, nonatomic) IBOutlet UIImageView *tom;
@end
@implementation ViewController
- (IBAction)drink {
    
    //1. 加载全部的动画图片
    NSMutableArray *images = [NSMutableArray array]; // 定义一个 images的空数组
//下面两行怎么添加不了图片到整个UIimage View 的背景啊?
    UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,600,1000)]; //
    imageView.image = [UIImage imageNamed:@"drink_01.jpg"];
    
    for (int i = 0; i<81; i++) {
        //计算文件名
        NSString *filename = [NSString stringWithFormat:@"drink_%02d.jpg",i];
        //加载图片
        UIImage *image = [UIImage imageNamed:filename];
        [images addObject:image];
    }
    self.tom.animationImages= images;
    
    //2. 设置播放次数
    self.tom.animationRepeatCount = 1;
    
    self.tom.animationDuration = images.count *0.1;
    [self.tom startAnimating];
    
    
}
@end

//下面两行怎么添加不了图片到整个UIimage View 的背景啊?
UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,600,1000)]; //
imageView.image = [UIImage imageNamed:@”drink_01.jpg”];
运行后整个 UIImage View 是空白的 咋回事啊 新手不太明白呢