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2014/10/15 ¤U¤È 10:14:45
iphone Programming Glossary: targetsize.widthResizing UIimages pulled from the Camera also ROTATES the UIimage? http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage is some code to do this UIImage imageByScalingToSize CGSize targetSize UIImage sourceImage self CGFloat targetWidth targetSize.width CGFloat targetHeight targetSize.height CGImageRef imageRef sourceImage CGImage CGBitmapInfo bitmapInfo CGImageGetBitmapInfo..
How to Rotate a UIImage 90 degrees? http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees targetSize UIImage anImage UIImage sourceImage anImage CGFloat targetWidth targetSize.height CGFloat targetHeight targetSize.width CGImageRef imageRef sourceImage CGImage CGBitmapInfo bitmapInfo CGImageGetBitmapInfo imageRef CGColorSpaceRef colorSpaceInfo..
How can I create a translucent modal UIViewController? http://stackoverflow.com/questions/1499298/how-can-i-create-a-translucent-modal-uiviewcontroller
http://stackoverflow.com/questions/262156/uiimage-rounded-corners is drawn at once we take into account the ideal of maintaining proportions float scaleFactor 0.0 float scaledWidth targetSize.width float scaledHeight targetSize.height CGPoint thumbnailPoint CGPointMake 0 0 since not all images are square we want to scale.. figure out the scale factor by dividing it by the intended width. Otherwise we'll use the height. float widthFactor targetSize.width width float heightFactor targetSize.height height if widthFactor heightFactor scaleFactor widthFactor else scaleFactor heightFactor.. heightFactor thumbnailPoint.y targetSize.height scaledHeight 0.5 else if widthFactor heightFactor thumbnailPoint.x targetSize.width scaledWidth 0.5 CGContextRef mainViewContentContext CGColorSpaceRef colorSpace colorSpace CGColorSpaceCreateDeviceRGB create..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop CGSize imageSize sourceImage.size CGFloat width imageSize.width CGFloat height imageSize.height CGFloat targetWidth targetSize.width CGFloat targetHeight targetSize.height CGFloat scaleFactor 0.0 CGFloat scaledWidth targetWidth CGFloat scaledHeight targetHeight..
Creating mask with CGImageMaskCreate is all black (iphone) http://stackoverflow.com/questions/633051/creating-mask-with-cgimagemaskcreate-is-all-black-iphone create a bitmap graphics context the size of the image mainViewContentContext CGBitmapContextCreate NULL targetSize.width targetSize.height 8 0 colorSpace kCGImageAlphaPremultipliedLast free the rgb colorspace CGColorSpaceRelease colorSpace if.. CGImageRef maskImage UIImage imageNamed @ mask.png CGImage CGContextClipToMask mainViewContentContext CGRectMake 0 0 targetSize.width targetSize.height maskImage CGContextDrawImage mainViewContentContext CGRectMake thumbnailPoint.x thumbnailPoint.y scaledWidth..
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