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2014/10/15 ¤U¤È 10:07:38
iphone Programming Glossary: drawinrectHow would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone color too saturated CGContextFillRect context rect draw base UIImage imageNamed @ someImage.png drawInRect rect blendMode kCGBlendModeOverlay alpha 1.0 draw image iphone cocoa touch image processing share..
iPhone UITextField - Change placeholder text color http://stackoverflow.com/questions/1340224/iphone-uitextfield-change-placeholder-text-color
http://stackoverflow.com/questions/158914/cropping-a-uiimage my target size. Since I want the center portion of the image I set the CGRect argument passed to drawInRect to something that's larger than the bounds of my image context. I was hoping this was Kosher but am.. hoping that drawing to an offscreen view wasn't one of these. Am I wrong Oh how I miss NSImage's drawInRect fromRect operation fraction method. iphone objective c cocoa touch image manipulation share improve..
How to add background image on iphone Navigation bar? http://stackoverflow.com/questions/1692487/how-to-add-background-image-on-iphone-navigation-bar CustomImage void drawRect CGRect rect UIImage image UIImage imageNamed @ NavigationBar.png image drawInRect CGRectMake 0 0 self.frame.size.width self.frame.size.height @end As of iOS 5 there is an official way..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio CGRect screenRect CGRectMake 0 0 320.0 480.0 UIGraphicsBeginImageContext screenRect.size value drawInRect screenRect blendMode kCGBlendModePlusDarker alpha 1 UIImage tmpValue UIGraphicsGetImageFromCurrentImageContext..
The simplest way to resize an UIImage? http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage . Pass 1.0 to force exact pixel size. UIGraphicsBeginImageContextWithOptions newSize NO 0.0 image drawInRect CGRectMake 0 0 newSize.width newSize.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop thumbnailRect.size.width scaledWidth thumbnailRect.size.height scaledHeight sourceImage drawInRect thumbnailRect newImage UIGraphicsGetImageFromCurrentImageContext if newImage nil NSLog @ could not..
What's the easiest way to resize/optimize an image size with the iPhone SDK? http://stackoverflow.com/questions/612131/whats-the-easiest-way-to-resize-optimize-an-image-size-with-the-iphone-sdk UIImage image scaledToSize CGSize newSize UIGraphicsBeginImageContext newSize image drawInRect CGRectMake 0 0 newSize.width newSize.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext..
Custom UINavigationBar Background http://stackoverflow.com/questions/704558/custom-uinavigationbar-background
Changing the background color of a UIAlertView? http://stackoverflow.com/questions/883208/changing-the-background-color-of-a-uialertview topCapHeight 16 CGSize theSize theAlert frame .size UIGraphicsBeginImageContext theSize theImage drawInRect CGRectMake 0 0 theSize.width theSize.height theImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
How would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone colorWithRed 0.5 green 0.5 blue 0 alpha 1 .CGColor don't make color too saturated CGContextFillRect context rect draw base UIImage imageNamed @ someImage.png drawInRect rect blendMode kCGBlendModeOverlay alpha 1.0 draw image iphone cocoa touch image processing share improve this question First you'll want to subclass UIImageView..
iPhone UITextField - Change placeholder text color http://stackoverflow.com/questions/1340224/iphone-uitextfield-change-placeholder-text-color
http://stackoverflow.com/questions/158914/cropping-a-uiimage the cropping by drawing into an offscreen image context of my target size. Since I want the center portion of the image I set the CGRect argument passed to drawInRect to something that's larger than the bounds of my image context. I was hoping this was Kosher but am I instead attempting to draw over other memory that I shouldn't.. UIKit that are restricted to the main thread. I was assuming hoping that drawing to an offscreen view wasn't one of these. Am I wrong Oh how I miss NSImage's drawInRect fromRect operation fraction method. iphone objective c cocoa touch image manipulation share improve this question I'm going to copy paste my response to the..
How to add background image on iphone Navigation bar? http://stackoverflow.com/questions/1692487/how-to-add-background-image-on-iphone-navigation-bar rootviewController @implementation UINavigationBar CustomImage void drawRect CGRect rect UIImage image UIImage imageNamed @ NavigationBar.png image drawInRect CGRectMake 0 0 self.frame.size.width self.frame.size.height @end As of iOS 5 there is an official way to do this. see iOS Developer Library someplace where you..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio ratio I'm using this code to resize an image on the iPhone CGRect screenRect CGRectMake 0 0 320.0 480.0 UIGraphicsBeginImageContext screenRect.size value drawInRect screenRect blendMode kCGBlendModePlusDarker alpha 1 UIImage tmpValue UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext Which is working great..
The simplest way to resize an UIImage? http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage pixel scaling factor and thus account for Retina resolution . Pass 1.0 to force exact pixel size. UIGraphicsBeginImageContextWithOptions newSize NO 0.0 image drawInRect CGRectMake 0 0 newSize.width newSize.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return newImage Example usage #import..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop CGRect thumbnailRect CGRectZero thumbnailRect.origin thumbnailPoint thumbnailRect.size.width scaledWidth thumbnailRect.size.height scaledHeight sourceImage drawInRect thumbnailRect newImage UIGraphicsGetImageFromCurrentImageContext if newImage nil NSLog @ could not scale image pop the context to get back to the default UIGraphicsEndImageContext..
What's the easiest way to resize/optimize an image size with the iPhone SDK? http://stackoverflow.com/questions/612131/whats-the-easiest-way-to-resize-optimize-an-image-size-with-the-iphone-sdk described in this post with the relevant code UIImage imageWithImage UIImage image scaledToSize CGSize newSize UIGraphicsBeginImageContext newSize image drawInRect CGRectMake 0 0 newSize.width newSize.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext return newImage As far as storage..
Custom UINavigationBar Background http://stackoverflow.com/questions/704558/custom-uinavigationbar-background
Changing the background color of a UIAlertView? http://stackoverflow.com/questions/883208/changing-the-background-color-of-a-uialertview theImage theImage stretchableImageWithLeftCapWidth 16 topCapHeight 16 CGSize theSize theAlert frame .size UIGraphicsBeginImageContext theSize theImage drawInRect CGRectMake 0 0 theSize.width theSize.height theImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext theAlert layer setContents theImage CGImage..
How would I tint an image programatically on the iPhone? http://stackoverflow.com/questions/1117211/how-would-i-tint-an-image-programatically-on-the-iphone 1 .CGColor don't make color too saturated CGContextFillRect context rect draw base UIImage imageNamed @ someImage.png drawInRect rect blendMode kCGBlendModeOverlay alpha 1.0 draw image iphone cocoa touch image processing share improve this question..
iPhone - How do you color an image? http://stackoverflow.com/questions/1223340/iphone-how-do-you-color-an-image UIGraphicsBeginImageContextWithOptions self.size NO imageScale else UIGraphicsBeginImageContext self.size self drawInRect rect CGContextRef context UIGraphicsGetCurrentContext CGContextSetBlendMode context kCGBlendModeSourceIn CGContextSetFillColorWithColor..
http://stackoverflow.com/questions/1309757/blend-two-uiimages CGSize newSize CGSizeMake width height UIGraphicsBeginImageContext newSize Use existing opacity as is bottomImage drawInRect CGRectMake 0 0 newSize.width newSize.height Apply supplied opacity image drawInRect CGRectMake 0 0 newSize.width newSize.height.. existing opacity as is bottomImage drawInRect CGRectMake 0 0 newSize.width newSize.height Apply supplied opacity image drawInRect CGRectMake 0 0 newSize.width newSize.height blendMode kCGBlendModeNormal alpha 0.8 UIImage newImage UIGraphicsGetImageFromCurrentImageContext..
iPhone UITextField - Change placeholder text color http://stackoverflow.com/questions/1340224/iphone-uitextfield-change-placeholder-text-color
http://stackoverflow.com/questions/158914/cropping-a-uiimage image context of my target size. Since I want the center portion of the image I set the CGRect argument passed to drawInRect to something that's larger than the bounds of my image context. I was hoping this was Kosher but am I instead attempting.. I was assuming hoping that drawing to an offscreen view wasn't one of these. Am I wrong Oh how I miss NSImage's drawInRect fromRect operation fraction method. iphone objective c cocoa touch image manipulation share improve this question I'm..
How to add background image on iphone Navigation bar? http://stackoverflow.com/questions/1692487/how-to-add-background-image-on-iphone-navigation-bar UINavigationBar CustomImage void drawRect CGRect rect UIImage image UIImage imageNamed @ NavigationBar.png image drawInRect CGRectMake 0 0 self.frame.size.width self.frame.size.height @end As of iOS 5 there is an official way to do this. see iOS..
Resize UIImage with aspect ratio? http://stackoverflow.com/questions/1703100/resize-uiimage-with-aspect-ratio an image on the iPhone CGRect screenRect CGRectMake 0 0 320.0 480.0 UIGraphicsBeginImageContext screenRect.size value drawInRect screenRect blendMode kCGBlendModePlusDarker alpha 1 UIImage tmpValue UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
Annotate PDF within iPhone SDK http://stackoverflow.com/questions/2313008/annotate-pdf-within-iphone-sdk one that is the original plus the annotation. To vary the annotations just add in more drawing code in place of the drawInRect withFont method. See the Drawing and Printing Guide for iOS for more on how to do that. void exampleAnnotation NSURL url.. currentContext 1.0 1.0 CGContextTranslateCTM currentContext 0 paperSize.size.height @ Example annotation drawInRect CGRectMake 100.0 100.0 200.0 40.0 withFont UIFont systemFontOfSize 18.0 UIGraphicsEndPDFContext CGPDFDocumentRelease document..
The simplest way to resize an UIImage? http://stackoverflow.com/questions/2658738/the-simplest-way-to-resize-an-uiimage Retina resolution . Pass 1.0 to force exact pixel size. UIGraphicsBeginImageContextWithOptions newSize NO 0.0 image drawInRect CGRectMake 0 0 newSize.width newSize.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
How do I use the NSString draw functionality to create a UIImage from text http://stackoverflow.com/questions/2765537/how-do-i-use-the-nsstring-draw-functionality-to-create-a-uiimage-from-text CGContextSetShadowWithColor ctx CGSizeMake 1.0 1.0 5.0 UIColor grayColor CGColor draw in context you can use also drawInRect withFont text drawAtPoint CGPointMake 0.0 0.0 withFont font transfer image UIImage image UIGraphicsGetImageFromCurrentImageContext..
UIWebView open links in Safari http://stackoverflow.com/questions/2899699/uiwebview-open-links-in-safari
CGContextDrawImage draws image upside down when passed UIImage.CGImage http://stackoverflow.com/questions/506622/cgcontextdrawimage-draws-image-upside-down-when-passed-uiimage-cgimage share improve this question Instead of CGContextDrawImage context CGRectMake 0 0 145 15 image.CGImage Use image drawInRect CGRectMake 0 0 145 15 In the middle of your begin end CGcontext methods. This will draw the image with the correct orientation..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop thumbnailPoint thumbnailRect.size.width scaledWidth thumbnailRect.size.height scaledHeight sourceImage drawInRect thumbnailRect newImage UIGraphicsGetImageFromCurrentImageContext if newImage nil NSLog @ could not scale image pop the..
What's the easiest way to resize/optimize an image size with the iPhone SDK? http://stackoverflow.com/questions/612131/whats-the-easiest-way-to-resize-optimize-an-image-size-with-the-iphone-sdk code UIImage imageWithImage UIImage image scaledToSize CGSize newSize UIGraphicsBeginImageContext newSize image drawInRect CGRectMake 0 0 newSize.width newSize.height UIImage newImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
Custom UINavigationBar Background http://stackoverflow.com/questions/704558/custom-uinavigationbar-background
UINavigationBar's drawRect is not called in iOS 5.0 http://stackoverflow.com/questions/7657465/uinavigationbars-drawrect-is-not-called-in-ios-5-0 UINavigationBar UINavigationBarCategory void drawRect CGRect rect UIImage img UIImage imageNamed @ navbar.png img drawInRect rect @end and in viewDidLoad method for iOS5 in your view implementation if self.navigationController.navigationBar respondsToSelector..
Changing the background color of a UIAlertView? http://stackoverflow.com/questions/883208/changing-the-background-color-of-a-uialertview 16 topCapHeight 16 CGSize theSize theAlert frame .size UIGraphicsBeginImageContext theSize theImage drawInRect CGRectMake 0 0 theSize.width theSize.height theImage UIGraphicsGetImageFromCurrentImageContext UIGraphicsEndImageContext..
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