网络加载图片

来源：互联网发布：云数据加密传输运营商编辑：程序博客网时间：2024/06/15 20:06

NSURL *imgUrl = [NSURL URLWithString:[NSString stringWithFormat:@"%@/%@",serverUrl,pic]]; //从服务器拿到图片的地址//    NSLog(@"fsdf %@",imgUrl);    if (hasCachedImage(imgUrl)) {        imghead.image = [UIImage imageWithContentsOfFile:pathForURL(imgUrl)];            //看本地理由木有这张图片的缓存    }else    {        NSDictionary *dic=[NSDictionary dictionaryWithObjectsAndKeys:imgUrl,@"url",imghead,@"imageView",nil];        [NSThread detachNewThreadSelector:@selector(cacheImage:) toTarget:[ImageCacher defaultCacher] withObject:dic];    }

<pre name="code" class="objc">-(void)cacheImage:(NSDictionary*)aDic{    NSURL *aURL=[aDic objectForKey:@"url"];        NSFileManager *fileManager=[NSFileManager defaultManager];    NSData *data=[NSData dataWithContentsOfURL:aURL] ;    UIImage *image=[UIImage imageWithData:data];    if (image==nil) {        return;    }    NSData *smallData=UIImagePNGRepresentation(image);                   NSLog(@"%@",pathInCacheDirectory(@"com.xmly"));    NSString *pathStr = [NSString stringWithFormat:@"%@",pathInCacheDirectory(@"com.xmly")];    if (![fileManager fileExistsAtPath:pathStr]) {                [fileManager createDirectoryAtPath:pathStr withIntermediateDirectories:YES attributes:Nil error:Nil];    }            if (smallData) {        [fileManager createFileAtPath:pathForURL(aURL) contents:smallData attributes:nil];    }        UIButton *bt = [aDic objectForKey:@"uibtton"];    if (bt) {        CATransition *transtion = [CATransition animation];        transtion.duration = 0.5;        [transtion setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];        [transtion setType:_type];        [transtion setSubtype:kCATransitionFromRight];                [bt.layer addAnimation:transtion forKey:@"transtionKey"];            [bt setImage:image forState:UIControlStateNormal];         UIGraphicsEndImageContext();                       return;    }        UIView *view=[aDic objectForKey:@"imageView"];                //判断view是否还存在 如果tablecell已经移出屏幕会被回收 那么什么都不用做，下次滚到该cell 缓存已存在 不需要执行此方法    if (view!=nil) {        CATransition *transtion = [CATransition animation];        transtion.duration = 0.5;        [transtion setTimingFunction:[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseInEaseOut]];        [transtion setType:_type];        [transtion setSubtype:kCATransitionFromRight];                [view.layer addAnimation:transtion forKey:@"transtionKey"];                if ([[view class] isSubclassOfClass:[UIImageView class]]) {            if ([[aDic objectForKey:@"type"] boolValue]) {                view.backgroundColor = [UIColor clearColor];                                [(UIImageView*)view setImage:[image grayscale:1]];            }            else            {                view.backgroundColor = [UIColor clearColor];                                [(UIImageView*)view setImage:image];            }        }               else        {            if ([aDic objectForKey:@"mohu1"] && [[aDic objectForKey:@"mohu1"] length] > 0) {                view.layer.contents = (id)[image blurredImage:70].CGImage;                view.contentMode = UIViewContentModeScaleToFill;            }            else if ([aDic objectForKey:@"mohu"] && [[aDic objectForKey:@"mohu"] length] > 0) {                view.layer.contents = (id)[image blurredImage:70].CGImage;                view.contentMode = UIViewContentModeScaleAspectFill;            }                        else if ([aDic objectForKey:@"fill"] && [[aDic objectForKey:@"fill"] length] > 0) {                view.layer.contents = (id)image.CGImage;                view.contentMode = UIViewContentModeScaleAspectFill;            }            else            {                if ([[aDic objectForKey:@"type"] boolValue]) {                    view.backgroundColor = [UIColor colorWithPatternImage:[image grayscale:1]];                }                else                {                    view.backgroundColor = [UIColor colorWithPatternImage:image];                }            }                    }            }    UIGraphicsEndImageContext();    }

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