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2014/10/15 ¤U¤È 10:14:44
iphone Programming Glossary: targetsize.heightResizing UIimages pulled from the Camera also ROTATES the UIimage? http://stackoverflow.com/questions/1260249/resizing-uiimages-pulled-from-the-camera-also-rotates-the-uiimage CGSize targetSize UIImage sourceImage self CGFloat targetWidth targetSize.width CGFloat targetHeight targetSize.height CGImageRef imageRef sourceImage CGImage CGBitmapInfo bitmapInfo CGImageGetBitmapInfo imageRef CGColorSpaceRef colorSpaceInfo..
How to Rotate a UIImage 90 degrees? http://stackoverflow.com/questions/1315251/how-to-rotate-a-uiimage-90-degrees UIImage reverseImageByScalingToSize CGSize targetSize UIImage anImage UIImage sourceImage anImage CGFloat targetWidth targetSize.height CGFloat targetHeight targetSize.width CGImageRef imageRef sourceImage CGImage CGBitmapInfo bitmapInfo CGImageGetBitmapInfo..
http://stackoverflow.com/questions/262156/uiimage-rounded-corners 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 proportionately. To do this we find.. 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 ex 500 0.5 250 newWidth scaledWidth.. if wider than tall we need to adjust the vertical drawing point y axis if widthFactor heightFactor thumbnailPoint.y targetSize.height scaledHeight 0.5 else if widthFactor heightFactor thumbnailPoint.x targetSize.width scaledWidth 0.5 CGContextRef mainViewContentContext..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop 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 CGPoint thumbnailPoint CGPointMake..
Creating mask with CGImageMaskCreate is all black (iphone) http://stackoverflow.com/questions/633051/creating-mask-with-cgimagemaskcreate-is-all-black-iphone 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 mainViewContentContext.. UIImage imageNamed @ mask.png CGImage CGContextClipToMask mainViewContentContext CGRectMake 0 0 targetSize.width targetSize.height maskImage CGContextDrawImage mainViewContentContext CGRectMake thumbnailPoint.x thumbnailPoint.y scaledWidth scaledHeight..
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