how to crop image in to pieces using - (UIImage *)stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight
i need to crop single image into 9 pieces.
for that most of them suggest the fallowing method.
- (UIImage *)stretchableImageWithLeftCapWidth:(NSInteger)leftCapWidth topCapHeight:(NSInteger)topCapHeight
But i did n't fine any where how do it using this.
can any one please help me.开发者_Python百科
how can i crop image using this method.
Thank u in advance.
The method stretchableImageWithLeftCapWidth:topCapHeight is not cropping the image. It allows you to stretch an image with vertical and horyzontal margin.
In the doc you will read :
stretchableImageWithLeftCapWidth:topCapHeight: Creates and returns a new image object with the specified cap values.
To crop an image you should use CGImageCreateWithImageInRect :
CGImageCreateWithImageInRect Creates a bitmap image using the data contained within a subregion of an existing bitmap image.
You can achieve what you want with a method such as this one :
- (UIImage *)imageFromImage:(UIImage *)image inRect:(CGRect)rect {
CGImageRef sourceImageRef = [image CGImage];
CGImageRef newImageRef = CGImageCreateWithImageInRect(sourceImageRef, rect);
UIImage *newImage = [UIImage imageWithCGImage:newImageRef scale:1.0 orientation:image.imageOrientation];
CGImageRelease(newImageRef);
return newImage;
}
Hope this helps, Vincent
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