ASIHTTPRequest的使用——下载缓存

来源：互联网发布：红警小说知乎编辑：程序博客网时间：2024/05/03 11:57

// .h文件#import <UIKit/UIKit.h>// 引导头文件#import "ASIHTTPRequest.h"#import "ASIDownloadCache.h"// 添加协议@interface ViewController : UIViewController <ASIHTTPRequestDelegate>- (void)click:(id)sender;@property (retain, nonatomic) UIImageView *img1;@end

// .m文件#import "ViewController.h"@interface ViewController ()@property (nonatomic, retain) NSDate *startData;@property (nonatomic, retain) NSDate *endData;@end@implementation ViewController- (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.}- (void)dealloc{    [_img1 release];    [self.startData release];    [self.endData release];        [super dealloc];}- (void)click:(id)sender{    [self download];}- (void)download{    // 第一种方法设置缓存    self.startData = [NSDate date];    NSLog(@"start-->%@",self.startData);        // 1网络请求类    // 1-1    NSString *url = @"http://d.hiphotos.baidu.com/album/w%3D2048/sign=349954701b4c510faec4e51a5461272d/d1a20cf431adcbefc5d4f4beadaf2edda2cc9fa2.jpg";    __block ASIHTTPRequest *request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:url]];    // 1-2    request.delegate = self;    // 1-3设置缓存时间，一周    request.secondsToCache = 24 * 60 * 60 * 7;        // 2下载缓存类    // 2-1    ASIDownloadCache *_cache = [ASIDownloadCache sharedCache];    // 2-2设置缓存目录    NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];    cachePath = [cachePath stringByAppendingPathComponent:@"res"];    [_cache setStoragePath:cachePath];    // 2-3    [request setCacheStoragePolicy:ASICachePermanentlyCacheStoragePolicy];    [request setDownloadCache:_cache];    [request setCachePolicy:ASIOnlyLoadIfNotCachedCachePolicy];    [request startAsynchronous];        // 第二种方法设置缓存    /*     // 1网络请求类     // 1-1     NSString *url=@"http://f.hiphotos.baidu.com/album/w%3D2048/sign=288b34a9e4dde711e7d244f693d7cc1b/18d8bc3eb13533fa7f621782a9d3fd1f40345b42.jpg";     __block ASIHTTPRequest *request =[ASIHTTPRequest requestWithURL:[NSURL URLWithString:url]];     // 1-2     request.delegate=self;     // 1-3设置缓存时间，一周     request.secondsToCache = 24 * 60 * 60 * 7;     // 1-4 设置完成时回调方法     [request setDidFinishSelector:@selector(success:)];          // 2下载缓存类     ASIDownloadCache *_cache = [ASIDownloadCache sharedCache];     // 2-1设置缓存目录     NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];     cachePath = [cachePath stringByAppendingPathComponent:@"res"];     [_cache setStoragePath:cachePath];     // 2-2设置缓存策略     [_cache setDefaultCachePolicy:ASIOnlyLoadIfNotCachedCachePolicy];     // 2-3 request永久存储     [request setCacheStoragePolicy:ASICachePermanentlyCacheStoragePolicy];     [request setDownloadCache:_cache];          [request startAsynchronous];     */}#pragma mark - ASIHTTPRequestDelegate// 第二种方法设置缓存- (void)success:(ASIHTTPRequest *)request{    if ([request didUseCachedResponse])    {        NSLog(@"来自于缓存");    }    else    {        NSLog(@"NO");    }}- (void)requestFinished:(ASIHTTPRequest *)request{    if ([request didUseCachedResponse])    {        self.endData = [NSDate date];        NSLog(@"来缓存-->%@",self.endData);        self.img1.image = [UIImage imageWithData:[request responseData]];    }    else    {        self.endData = [NSDate date];        NSLog(@"   NO-->%@",self.endData);        self.img1.image = [UIImage imageWithData:[request responseData]];    }}- (void)requestFailed:(ASIHTTPRequest *)request{    }@end

0 0