ここでは、静的メソッドを持つUIImageのカテゴリごとに画像をバイナリデータに変換しています。私の問題は、UIImageJPEGRepresentationとUIImagePNGRepresentationが6秒まで非常に遅いことです。1秒の解決策が必要です。誰でも助けてくれますか。ここでは、画像のサイズが10kbs以下になるまで、画像をカテゴリメソッドに渡します。
-(NSData *)imageConvertToBinary :(UIImage *) image{
NSLog(@"Image Convert ");
//UIImagePNGRepresentation(image);
NSData *imageData = UIImageJPEGRepresentation(image, .000032);
NSLog(@"Image Done ");
//Change size of image to 10kbs
int size = imageData.length;
NSLog(@"SIZE OF IMAGE:First %i ", size);
NSData *data = UIImageJPEGRepresentation(image, .0032);
NSLog(@"Start while ");
int temp=0;
while (data.length / 1000 >= 10) {
image = [UIImage imageWithImage:image andWidth:image.size.width/2 andHeight:image.size.height/2];
data = UIImageJPEGRepresentation(image, .0032);
temp++;
NSLog(@"temp %u",temp);
}
size = data.length;
NSLog(@"SIZE OF IMAGE:after %i ", size);
return data;
}
and also i have category class on UIImage
@implementation UIImage (ImageProcessing)
+(UIImage*)imageWithImage:(UIImage*)image andWidth:(CGFloat)width andHeight:(CGFloat)height
{
UIGraphicsBeginImageContext( CGSizeMake(width, height));
[image drawInRect:CGRectMake(0,0,width,height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}
@end
NSData * data; 何かと等しくなければなりません