IOS中的TOM(解决缓存,图片加载)

#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UIImageView *imageView;
- (IBAction)drink;
- (IBAction)tou;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.imageView.image = [UIImage imageNamed:@"angry_00.jpg"];
}

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

- (void)anAnimating:(int)num name:(NSString *)name{
    if(self.imageView.isAnimating) return;
    NSMutableArray *images = [NSMutableArray array];
    //for循环读出所有的的文件名
    for (int i = 0; i < num; i++) {
        //占位符的妙用,%2d 表示占两位,不足的用空格补上
        //%02d表示占两位不足的用0补上
        
        NSString *filename = [NSString stringWithFormat:@"%@_%02d.jpg",name,i];
        //有缓存
        // UIImage *image = [UIImage imageNamed:filename];
        //获得文件的全路径
        //没有缓存
        NSBundle *bundle = [NSBundle mainBundle];
        NSString *path = [bundle pathForResource:filename ofType:nil];
        UIImage *image = [UIImage imageWithContentsOfFile:path];
        
        [images addObject:image];
        
    }
    NSLog(@"%@",images);
    //imageView的动态方法animationImages加载动画
    //animationRepeatCount动画执行的趟数
    //animationDuration动画的延迟时间
    //startAnimating动画开始
    //- (void)stopAnimating;停止动画
    //- (BOOL)isAnimating;动画是否在执行
    //imageview占内存
    self.imageView.animationImages = images;
    
    self.imageView.animationRepeatCount = 1;
    self.imageView.animationDuration = images.count*0.05;
    [self.imageView startAnimating];
    
    
    //直接写这导致动画还没放完就清空了
    //设置一个定时器
    //self.imageView.animationImages = nil;
    //设置定时器
    //withObject  表示要传的参数
    CGFloat delay = self.imageView.animationDuration + 1.0;
    [self performSelector:@selector(clearCache) withObject:nil afterDelay:delay];

}

- (IBAction)drink {
    //knockout
    [self anAnimating:81 name:@"drink"];
}
- (void)clearCache
{
    self.imageView.animationImages = nil;
}
//解决缓存问题,当上一个动画没有执行完,会把上一个动画放到缓存区,占用资源,解决这个问题就是释放上次的动作资源
//缓存的好处就是速度快
- (IBAction)tou {
    [self anAnimating:81 name:@"knockout"];

}
@end