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2014/10/15 ¤U¤È 10:11:19
iphone Programming Glossary: maskimage.size.heightCropping image with transparency in iPhone http://stackoverflow.com/questions/10810798/cropping-image-with-transparency-in-iphone maskImageRef maskImage CGImage CGContextRef mainViewContentContext CGBitmapContextCreate NULL maskImage.size.width maskImage.size.height 8 0 colorSpace kCGImageAlphaPremultipliedLast if mainViewContentContext NULL return NULL CGFloat ratio 0 ratio maskImage.size.width.. NULL return NULL CGFloat ratio 0 ratio maskImage.size.width image.size.width if ratio image.size.height maskImage.size.height ratio maskImage.size.height image.size.height CGRect rect1 0 0 maskImage.size.width maskImage.size.height CGRect rect2 image.size.width.. CGFloat ratio 0 ratio maskImage.size.width image.size.width if ratio image.size.height maskImage.size.height ratio maskImage.size.height image.size.height CGRect rect1 0 0 maskImage.size.width maskImage.size.height CGRect rect2 image.size.width ratio maskImage.size.width..
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