iOS UIImageView 网络加载图片自适应大小问题

#pragma mark - /////// //图片部分

for (int i =
0; i < [_imageArray
count]; i++) {

UIImageView * imageV = (UIImageView *)[_imageArray
objectAtIndex:i];

if (imageV.superview) {

[imageV removeFromSuperview];

}

}

[_imageArray
removeAllObjects];

//自定义图片高度

CGFloat showImageH ;

for (int i =
0; i < [ymData.showImageArray
count]; i++) {

//假定图片的高就是80了ShowImage_H----kDistance 20 //说说和图片的间隔---#define
TableHeader 50

//自己改的

showImageH = 80;//(IPHONE_WIDTH - 50)/3;

UIImageView *imageView = [[UIImageView
alloc]initWithFrame:CGRectMake(20 +
5*(i%3) + showImageH*(i%3),
TableHeader - 3 +
5 * ((i/3) +
1) + (i/3) * showImageH + hhhh +
kDistance + (ymData.islessLimit?0:30), showImageH, showImageH)];

imageView.contentMode =
UIViewContentModeScaleToFill;

// UIImageView *image = [[UIImageView alloc] initWithFrame:CGRectMake(((screenWidth - 240)/4)*(i%3 + 1) + 80*(i%3), TableHeader + 10 * ((i/3) + 1) + (i/3) * ShowImage_H + hhhh + kDistance + (ymData.islessLimit?0:30), 80, ShowImage_H)];

imageView.userInteractionEnabled =
YES;

YMTapGestureRecongnizer *tap = [[YMTapGestureRecongnizer
alloc]
initWithTarget:self
action:@selector(tapImageView:)];

[imageView addGestureRecognizer:tap];

tap.appendArray = ymData.showImageArray;

imageView.backgroundColor = [UIColor
clearColor];

imageView.tag =
kImageTag + i;

// image.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@",[ymData.showImageArray objectAtIndex:i]]];

NSString *imgStr = [[ymData.showImageArray
objectAtIndex:i] stringByReplacingOccurrencesOfString:@"."
withString:@"."];

NSString *imgStr_S = [imgStr
stringByReplacingOccurrencesOfString:@"."
withString:@"_s."];

NSString *urlStr_S = [NSString
stringWithFormat:KimgUrl@"dynamic/%@",imgStr_S];

NSLog(@"-------朋友圈-
缩略图 -images-----：urlStr------%@",urlStr_S);

// UIImage *placeholder = [UIImage imageNamed:@"hstp"];

// NSString *urlStr = [NSString stringWithFormat:KimgUrl@"dynamic/%@",imgStr];

// [image setImageURLStr:urlStr placeholder:placeholder];

__block UIActivityIndicatorView *activityIndicator;

[imageView sd_setImageWithURL:[NSURL
URLWithString:urlStr_S]
placeholderImage:[UIImage
imageNamed:@"mrbg1"]
options:SDWebImageProgressiveDownload
progress:^(NSInteger receivedSize,
NSInteger expectedSize) {

if (!activityIndicator)

{

activityIndicator = [[UIActivityIndicatorView
alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];

activityIndicator.center = imageView.center;

//把更新UI放到主线程

dispatch_async(dispatch_get_main_queue(), ^{

[imageView addSubview:activityIndicator];

});

[activityIndicator startAnimating];

}

} completed:^(UIImage *image,
NSError *error, SDImageCacheType cacheType,
NSURL *imageURL) {

float a = image.size.width;

float b = image.size.height;

NSLog(@"----width--%f----height--%f-------",a,b);

if ([ymData.showImageArray
count] == 1) {

// [imageView sizeToFit];

imageView.frame =
CGRectMake(20 +
5*(i%3) + showImageH*(i%3),
TableHeader - 3 +
5 * ((i/3) +
1) + (i/3) * showImageH + hhhh +
kDistance + (ymData.islessLimit?0:30), a/4, b/4);

// showImageH = imageView.frame.size.height;

_ShowImage_HH =
150;//600/4;

}else{

_ShowImage_HH =
80;

}

//改变图片的显示方式-----让它不压缩，部分显示

[activityIndicator stopAnimating];

}];

//

// NSLog(@"------image--- cell ---
尺寸-----%@",NSStringFromCGSize(image.image.size));

//

//

//

// NSURL *url_S = [NSURL URLWithString:urlStr_S];

// NSData *resultData_S = [NSData dataWithContentsOfURL:url_S];

// NSLog(@"------cell-图片大小_S--------%lu",(unsigned long)[resultData_S length]);

// UIImage *img_S = [UIImage imageWithData:resultData_S];

// NSLog(@"------cell--图片尺寸_S-------%@",NSStringFromCGSize(img_S.size));

//

[self.contentView
addSubview:imageView];

[_imageArray
addObject:imageView];

}