#import "ViewController.h"

@interface ViewController ()<NSCacheDelegate>

@property (nonatomic, strong) NSCache *cache;

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

}

- (NSCache *)cache {

    if (_cache == nil) {

        _cache = [[NSCache alloc] init];

        _cache.countLimit = ;

        _cache.delegate = self;

    }

    return _cache;

}

- (IBAction)saveBtnClick:(id)sender {

    for (NSInteger i = ; i < ; i++) {

        NSDictionary *params = @{@"key":@"number", @"value":@(i)};

        [self.cache setObject:params forKey:@(i)];

    }

}

- (IBAction)getBtnClick:(id)sender {

    for (NSInteger i = ; i < ; i++) {

        NSDictionary *params = [self.cache objectForKey:@(i)];

        NSLog(@"----params---%@", params);

    }

}

#pragma mark - 代理

- (void)cache:(NSCache *)cache willEvictObject:(id)obj {

    NSLog(@"-----开启了回收机制---数据=%@", obj);

}