基于SDWebImage 缓存图片 针对ImageView和Button

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/*********************************************************************************************

 *   __      __   _         _________     _ _     _    _________   __         _         __   *

 * \ \    / /  | |        | _______|   | | \   | |  |  ______ |  \ \       / \       / /   *

 *   \ \  / /   | |        | |          | |\ \  | |  | |     | |   \ \     / \ \     / /    *

 *     \ \/ /    | |        | |______    | | \ \ | |  | |     | |    \ \   / / \ \   / /     *

 *     /\/\/\    | |        |_______ |   | |  \ \| |  | |     | |     \ \ / /   \ \ / /      *

 *    / /  \ \   | |______   ______| |   | |   \ \ |  | |_____| |      \ \ /     \ \ /       *

 *   /_/    \_\  |________| |________|   |_|    \__|  |_________|       \_/       \_/        *

 *                                                                                           *

 *********************************************************************************************/


#import "XLImageURLCacher.h"


#import "UIImageView+WebCache.h"

#import "UIButton+WebCache.h"

#import "SDImageCache.h"


@interface XLImageURLCacher ()



@end


@implementation XLImageURLCacher


/**************************************************************************************************/

static XLImageURLCacher *instance = nil;

+ (XLImageURLCacher *)sharedImageURLCacher {

    static dispatch_once_t onceToken;

    dispatch_once(&onceToken, ^{

        instance = [[self alloc] init];

    });

    return instance;

}

/**************************************************************************************************/


- (void)xl_setCacheWithImageView:(UIImageView *)imageView imageURL:(NSString *)imageURL imageKey:(NSString *)imageKey {

    [imageView setShowActivityIndicatorView:YES];

    [imageView setIndicatorStyle:UIActivityIndicatorViewStyleGray];//显示加载

    

    imageView.contentMode = UIViewContentModeScaleAspectFill;

    [imageView sd_setImageWithURL:[NSURL URLWithString:imageURL] placeholderImage:nil];

    

    [[SDWebImageManager sharedManager].imageDownloader downloadImageWithURL:[NSURL URLWithString:imageURL] options:SDWebImageDownloaderContinueInBackground progress:^(NSInteger receivedSize, NSInteger expectedSize) {

        

    } completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) {

        [[SDWebImageManager sharedManager].imageCache storeImage:image forKey:imageKey toDisk:YES];// 缓存图片

    }];

    // 从缓存取图片并显示

    UIImage *cacheImage = [[SDWebImageManager sharedManager].imageCache imageFromDiskCacheForKey:imageKey];

    [imageView setImage:cacheImage];

}


/**************************************************************************************************/


- (void)xl_setCacheWithImageButton:(UIButton *)imageButton imageURL:(NSString *)imageURL imageKey:(NSString *)imageKey {

    [imageButton sd_setImageWithURL:[NSURL URLWithString:imageURL] forState:(UIControlStateNormal) placeholderImage:nil];

    

    [[SDWebImageManager sharedManager].imageDownloader downloadImageWithURL:[NSURL URLWithString:imageURL] options:SDWebImageDownloaderContinueInBackground progress:^(NSInteger receivedSize, NSInteger expectedSize) {

        

    } completed:^(UIImage *image, NSData *data, NSError *error, BOOL finished) {

        [[SDWebImageManager sharedManager].imageCache storeImage:image forKey:imageKey toDisk:YES];//缓存图片

    }];

    // 从缓存取图片并显示

    UIImage *cacheImage = [[SDWebImageManager sharedManager].imageCache imageFromDiskCacheForKey:imageKey];

    [imageButton setImage:cacheImage forState:(UIControlStateNormal)];

}


@end


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