I am currently using code that is not blurry but it just cuts a piece out, and if I try to use different ones online, it cuts a piece out and it becomes blurry as well. What do I need to be doing, the picture is 512x512 trying to get it down to 100x100 and it is a jpg.
Here is the code I use now:
//setting up each cell
-(UICollectionViewCell *)collectionView:(UICollectionView *)collectionView
cellForItemAtIndexPath:(NSIndexPath *)indexPath
{
CollectionGridCell *myCell = [collectionView
dequeueReusableCellWithReuseIdentifier:@"GridCell"
forIndexPath:indexPath];
long row = [indexPath row];
NSURL *baseUrl = [NSURL URLWithString:@"http://example.com/"];
NSString *imageItemName = [homeImages objectAtIndex:row];
NSURL *url = [NSURL URLWithString:imageItemName relativeToURL:baseUrl];
// NSURL *url = /* prepare a url... see note below */
[myCell.homeImage setImageWithURL:url
placeholderImage:[UIImage imageNamed:@"menuButton.png"]
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType) {
// inspect cacheType here to make sure it's cached as you want it
myCell.homeImage.image = [self resizeImage:image newSize:CGSizeMake(75,75)];
}];
return myCell;
}
- (UIImage *)resizeImage:(UIImage*)image newSize:(CGSize)newSize {
CGRect newRect = CGRectIntegral(CGRectMake(0, 0, newSize.width, newSize.height));
CGImageRef imageRef = image.CGImage;
UIGraphicsBeginImageContextWithOptions(newSize, NO, 0);
CGContextRef context = UIGraphicsGetCurrentContext();
// Set the quality level to use when rescaling
CGContextSetInterpolationQuality(context, kCGInterpolationHigh);
CGAffineTransform flipVertical = CGAffineTransformMake(1, 0, 0, -1, 0, newSize.height);
CGContextConcatCTM(context, flipVertical);
// Draw into the context; this scales the image
CGContextDrawImage(context, newRect, imageRef);
// Get the resized image from the context and a UIImage
CGImageRef newImageRef = CGBitmapContextCreateImage(context);
UIImage *newImage = [UIImage imageWithCGImage:newImageRef];
CGImageRelease(newImageRef);
UIGraphicsEndImageContext();
return newImage;
}
UPDATE: Every method I tried even the ones below so far, lead to a cropping out of the middle. Do I have to specify something else in my code, is there something calling it to crop out the middle?
This is my grid cell .h file:
#import <UIKit/UIKit.h>
@interface CollectionGridCell : UICollectionViewCell
@property (weak, nonatomic) IBOutlet UIImageView *homeImage;
@end
This is my grid cell .m file:
#import "CollectionGridCell.h"
@implementation CollectionGridCell
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
}
return self;
}
/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
// Drawing code
}
*/
@end