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2014/10/15 ¤U¤È 10:13:12
iphone Programming Glossary: redMKPinAnnotationView: Are there more than three colors available? http://stackoverflow.com/questions/1185611/mkpinannotationview-are-there-more-than-three-colors-available colors available According to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone.. annView if annotationDelegate.type localizedCaseInsensitiveCompare @ NeedsBluePin NSOrderedSame UIImage image UIImage imageNamed @ blue_pin.png UIImageView imageView UIImageView alloc initWithImage..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale int byteIndex bytesPerRow yCoordinate xCoordinate bytesPerPixel Getting original colors float red rawData byteIndex 255.f float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing.. byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color components.. float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color components rawData byteIndex unsigned..
iPhone how to check that a string is numeric only http://stackoverflow.com/questions/1320295/iphone-how-to-check-that-a-string-is-numeric-only should work with the iPhone. It's based on the RegexKitLite regular expressions and turns the text red when its invalid. static bool TextIsValidValue NSString newText double value bool result false if newText..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone Information I defined constants #define RGBA 4 #define RGBA_8_BIT 8 In my UIImage subclass I declared instance variables size_t bytesPerRow size_t byteCount size_t pixelCount CGContextRef context CGColorSpaceRef.. RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green byte blue byte alpha RGBAPixel Bitmap function returns pre calculated RGBA divide RGB by.. unmodified RGB RGBAPixel bitmap NSLog @ Returning bitmap representation of UIImage. 8 bits each of red green blue and alpha. self setBytesPerRow self.size.width RGBA self setByteCount bytesPerRow self.size.height..
Custom Delete button On Editing in UITableView Cell http://stackoverflow.com/questions/1615469/custom-delete-button-on-editing-in-uitableview-cell NSIndexPath indexPath return @ Sagar What if I want a custom image instead of the default red button iphone uitableview uitableviewcellstylevalue share improve this question luvieere is right.. this question luvieere is right if you want that same delete metaphor you want to keep it at the red button that Apple provides. Why change it Its globally recognizable as the standard for delete buttons...
iphone/ipad: How exactly use NSAttributedString? http://stackoverflow.com/questions/3786528/iphone-ipad-how-exactly-use-nsattributedstring setTextColor UIColor grayColor now we only change the color of Hello attrStr setTextColor UIColor redColor range NSMakeRange 0 5 2 Affect the NSAttributedString to the OHAttributedLabel myAttributedLabel.attributedText.. UITextAlignmentJustify Hello World will be displayed in the label justified Hello in red and World in gray. Note In iOS 6 you can render attributed strings using the attributedText property..
http://stackoverflow.com/questions/664930/uibarbuttonitem-with-color with color Is it possible to have a red UIBarButtonItem iphone cocoa touch share improve this question If anyone is looking for code to..
How do I draw a line on the iPhone? http://stackoverflow.com/questions/856354/how-do-i-draw-a-line-on-the-iphone that draws a line void drawRect CGRect rect CGContextRef c UIGraphicsGetCurrentContext CGFloat red 4 1.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor c red CGContextBeginPath c CGContextMoveToPoint c 5.0f.. c UIGraphicsGetCurrentContext CGFloat red 4 1.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor c red CGContextBeginPath c CGContextMoveToPoint c 5.0f 5.0f CGContextAddLineToPoint c 50.0f 50.0f CGContextStrokePath.. 50.0f CGContextStrokePath c Save everything and click Build and Run you should now see a short red line on the iPhone. For more information about Core Graphics look up the Apple Documentation. I've also..
Changing the background color of a UIAlertView? http://stackoverflow.com/questions/883208/changing-the-background-color-of-a-uialertview theAlert show UILabel theTitle theAlert valueForKey @ _titleLabel theTitle setTextColor UIColor redColor UILabel theBody theAlert valueForKey @ _bodyTextLabel theBody setTextColor UIColor blueColor UIImage..
MKPinAnnotationView: Are there more than three colors available? http://stackoverflow.com/questions/1185611/mkpinannotationview-are-there-more-than-three-colors-available Are there more than three colors available According to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone cocoa touch mapkit mkpinannotationview share improve this.. ... get the annotation delegate and allocate the MKAnnotationView annView if annotationDelegate.type localizedCaseInsensitiveCompare @ NeedsBluePin NSOrderedSame UIImage image UIImage imageNamed @ blue_pin.png UIImageView imageView UIImageView alloc initWithImage image autorelease annView addSubview imageView ... ..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale for int yCoordinate 0 yCoordinate height yCoordinate int byteIndex bytesPerRow yCoordinate xCoordinate bytesPerPixel Getting original colors float red rawData byteIndex 255.f float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f.. colors float red rawData byteIndex 255.f float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color components rawData byteIndex unsigned char red 255 rawData byteIndex 1.. byteIndex 255.f float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color components rawData byteIndex unsigned char red 255 rawData byteIndex 1 unsigned char green..
iPhone how to check that a string is numeric only http://stackoverflow.com/questions/1320295/iphone-how-to-check-that-a-string-is-numeric-only I use this code in my Mac app the same or similar should work with the iPhone. It's based on the RegexKitLite regular expressions and turns the text red when its invalid. static bool TextIsValidValue NSString newText double value bool result false if newText isMatchedByRegex @ ^ 0 1 9 d . d result true value newText..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone a read only reference to data . Method 1 Writable Pixel Information I defined constants #define RGBA 4 #define RGBA_8_BIT 8 In my UIImage subclass I declared instance variables size_t bytesPerRow size_t byteCount size_t pixelCount CGContextRef context CGColorSpaceRef colorSpace UInt8 pixelByteData A pointer to an array.. pixelByteData A pointer to an array of RGBA bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green byte blue byte alpha RGBAPixel Bitmap function returns pre calculated RGBA divide RGB by A to get unmodified RGB RGBAPixel bitmap NSLog @ Returning bitmap.. function returns pre calculated RGBA divide RGB by A to get unmodified RGB RGBAPixel bitmap NSLog @ Returning bitmap representation of UIImage. 8 bits each of red green blue and alpha. self setBytesPerRow self.size.width RGBA self setByteCount bytesPerRow self.size.height self setPixelCount self.size.width self.size.height..
Custom Delete button On Editing in UITableView Cell http://stackoverflow.com/questions/1615469/custom-delete-button-on-editing-in-uitableview-cell tableView titleForDeleteConfirmationButtonForRowAtIndexPath NSIndexPath indexPath return @ Sagar What if I want a custom image instead of the default red button iphone uitableview uitableviewcellstylevalue share improve this question luvieere is right if you want that same delete metaphor you want to keep it.. uitableview uitableviewcellstylevalue share improve this question luvieere is right if you want that same delete metaphor you want to keep it at the red button that Apple provides. Why change it Its globally recognizable as the standard for delete buttons. Although if you want something like Tweetie where you completely..
iphone/ipad: How exactly use NSAttributedString? http://stackoverflow.com/questions/3786528/iphone-ipad-how-exactly-use-nsattributedstring string attrStr setFont UIFont systemFontOfSize 12 attrStr setTextColor UIColor grayColor now we only change the color of Hello attrStr setTextColor UIColor redColor range NSMakeRange 0 5 2 Affect the NSAttributedString to the OHAttributedLabel myAttributedLabel.attributedText attrStr Use the Justified alignment myAttributedLabel.textAlignment..
http://stackoverflow.com/questions/664930/uibarbuttonitem-with-color with color Is it possible to have a red UIBarButtonItem iphone cocoa touch share improve this question If anyone is looking for code to exactly duplicate a simple UIBarButtonItem UIButton button..
How do I draw a line on the iPhone? http://stackoverflow.com/questions/856354/how-do-i-draw-a-line-on-the-iphone the drawRect method in MyView.m here's some example code that draws a line void drawRect CGRect rect CGContextRef c UIGraphicsGetCurrentContext CGFloat red 4 1.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor c red CGContextBeginPath c CGContextMoveToPoint c 5.0f 5.0f CGContextAddLineToPoint c 50.0f 50.0f CGContextStrokePath.. code that draws a line void drawRect CGRect rect CGContextRef c UIGraphicsGetCurrentContext CGFloat red 4 1.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor c red CGContextBeginPath c CGContextMoveToPoint c 5.0f 5.0f CGContextAddLineToPoint c 50.0f 50.0f CGContextStrokePath c Save everything and click Build and Run you should.. c 5.0f 5.0f CGContextAddLineToPoint c 50.0f 50.0f CGContextStrokePath c Save everything and click Build and Run you should now see a short red line on the iPhone. For more information about Core Graphics look up the Apple Documentation. I've also found it helpful to search for functions beginning with..
Changing the background color of a UIAlertView? http://stackoverflow.com/questions/883208/changing-the-background-color-of-a-uialertview nil cancelButtonTitle @ OK otherButtonTitles nil autorelease theAlert show UILabel theTitle theAlert valueForKey @ _titleLabel theTitle setTextColor UIColor redColor UILabel theBody theAlert valueForKey @ _bodyTextLabel theBody setTextColor UIColor blueColor UIImage theImage UIImage imageNamed @ Background.png theImage..
How does the iOS app Display Recorder record the screen without using private API? http://stackoverflow.com/questions/11090184/how-does-the-ios-app-display-recorder-record-the-screen-without-using-private-ap analysis Apple runs how were they able to do this recording in an approved application Additionally the app causes a red bar to appear at the top of the screen while it records similar to the native iOS's phone call functionality. I've been.. an iOS developer for awhile and I'm a bit stumped at how this was even done even down to the detail of putting the red bar at the top when outside of the app. I was under the impression we basically had no control of what's happening when..
MKPinAnnotationView: Are there more than three colors available? http://stackoverflow.com/questions/1185611/mkpinannotationview-are-there-more-than-three-colors-available there more than three colors available According to the Apple docs MKPinAnnotationView's pin color is available in red green and purple. Is there any way to get other colors also I've found nothing in the docs. iphone cocoa touch mapkit mkpinannotationview.. allocate the MKAnnotationView annView if annotationDelegate.type localizedCaseInsensitiveCompare @ NeedsBluePin NSOrderedSame UIImage image UIImage imageNamed @ blue_pin.png UIImageView imageView UIImageView alloc initWithImage image autorelease..
http://stackoverflow.com/questions/1298867/convert-image-to-grayscale height yCoordinate int byteIndex bytesPerRow yCoordinate xCoordinate bytesPerPixel Getting original colors float red rawData byteIndex 255.f float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data.. float green rawData byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color components rawData byteIndex unsigned.. byteIndex 1 255.f float blue rawData byteIndex 2 255.f Processing pixel data float averageColor red green blue 3.0f red averageColor green averageColor blue averageColor Assigning new color components rawData byteIndex unsigned char red 255..
iPhone how to check that a string is numeric only http://stackoverflow.com/questions/1320295/iphone-how-to-check-that-a-string-is-numeric-only the same or similar should work with the iPhone. It's based on the RegexKitLite regular expressions and turns the text red when its invalid. static bool TextIsValidValue NSString newText double value bool result false if newText isMatchedByRegex..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone 1 Writable Pixel Information I defined constants #define RGBA 4 #define RGBA_8_BIT 8 In my UIImage subclass I declared instance variables size_t bytesPerRow size_t byteCount size_t pixelCount CGContextRef context CGColorSpaceRef colorSpace.. bytes in memory RPVW_RGBAPixel pixelData The pixel struct with alpha in this version typedef struct RGBAPixel byte red byte green byte blue byte alpha RGBAPixel Bitmap function returns pre calculated RGBA divide RGB by A to get unmodified.. RGB by A to get unmodified RGB RGBAPixel bitmap NSLog @ Returning bitmap representation of UIImage. 8 bits each of red green blue and alpha. self setBytesPerRow self.size.width RGBA self setByteCount bytesPerRow self.size.height self setPixelCount..
Custom Delete button On Editing in UITableView Cell http://stackoverflow.com/questions/1615469/custom-delete-button-on-editing-in-uitableview-cell NSIndexPath indexPath return @ Sagar What if I want a custom image instead of the default red button iphone uitableview uitableviewcellstylevalue share improve this question luvieere is right if you want that.. share improve this question luvieere is right if you want that same delete metaphor you want to keep it at the red button that Apple provides. Why change it Its globally recognizable as the standard for delete buttons. Although if you..
iphone/ipad: How exactly use NSAttributedString? http://stackoverflow.com/questions/3786528/iphone-ipad-how-exactly-use-nsattributedstring 12 attrStr setTextColor UIColor grayColor now we only change the color of Hello attrStr setTextColor UIColor redColor range NSMakeRange 0 5 2 Affect the NSAttributedString to the OHAttributedLabel myAttributedLabel.attributedText attrStr.. myAttributedLabel.textAlignment UITextAlignmentJustify Hello World will be displayed in the label justified Hello in red and World in gray. Note In iOS 6 you can render attributed strings using the attributedText property of UILabel. share..
How to make one color transparent on a UIImage? http://stackoverflow.com/questions/633722/how-to-make-one-color-transparent-on-a-uiimage
http://stackoverflow.com/questions/664930/uibarbuttonitem-with-color with color Is it possible to have a red UIBarButtonItem iphone cocoa touch share improve this question If anyone is looking for code to exactly duplicate a..
How do I draw a line on the iPhone? http://stackoverflow.com/questions/856354/how-do-i-draw-a-line-on-the-iphone some example code that draws a line void drawRect CGRect rect CGContextRef c UIGraphicsGetCurrentContext CGFloat red 4 1.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor c red CGContextBeginPath c CGContextMoveToPoint c 5.0f 5.0f CGContextAddLineToPoint.. CGRect rect CGContextRef c UIGraphicsGetCurrentContext CGFloat red 4 1.0f 0.0f 0.0f 1.0f CGContextSetStrokeColor c red CGContextBeginPath c CGContextMoveToPoint c 5.0f 5.0f CGContextAddLineToPoint c 50.0f 50.0f CGContextStrokePath c Save everything.. c 50.0f 50.0f CGContextStrokePath c Save everything and click Build and Run you should now see a short red line on the iPhone. For more information about Core Graphics look up the Apple Documentation. I've also found it helpful..
Changing the background color of a UIAlertView? http://stackoverflow.com/questions/883208/changing-the-background-color-of-a-uialertview nil autorelease theAlert show UILabel theTitle theAlert valueForKey @ _titleLabel theTitle setTextColor UIColor redColor UILabel theBody theAlert valueForKey @ _bodyTextLabel theBody setTextColor UIColor blueColor UIImage theImage UIImage..
iOS - color on xcode simulator is different from the color on device http://stackoverflow.com/questions/10039641/ios-color-on-xcode-simulator-is-different-from-the-color-on-device based on my experience i added the following RGB values to get the color I wanted it is only rough and worked for me Red 12 Green 19 Blue 16 Different angles best to keep it horizontal Holding the phone in different angles also gives different..
Unable to Populate TableView In PopOverController - Objective C http://stackoverflow.com/questions/11222148/unable-to-populate-tableview-in-popovercontroller-objective-c NO self.contentSizeForViewInPopover CGSizeMake 150.0 140.0 self.keys1 NSMutableArray array keys1 addObject @ Red keys1 addObject @ Green keys1 addObject @ Blue NSInteger numberOfSectionsInTableView UITableView tableView Return the number..
How to NSLog pixel RGB from a UIImage? http://stackoverflow.com/questions/1352989/how-to-nslog-pixel-rgb-from-a-uiimage i 4 CHANGE PIXELS HERE Sidenote Just show me how to NSLog them Example NSLog @ Alpha 255 Value is u data i NSLog @ Red 255 Value is u data i 1 NSLog @ Green 255 Value is u data i 2 NSLog @ Blue 255 Value is u data i 3 CREATE NEW UIIMAGE newImage.. Did this direction work for you I'd get pixel data like this UInt32 pixels CGBitmapContextGetData ctx #define getRed p p 0x000000FF #define getGreen p p 0x0000FF00 8 #define getBlue p p 0x00FF0000 16 display RGB values from the 11th pixel..
Applying background gradient to a Grouple table cell http://stackoverflow.com/questions/1979165/applying-background-gradient-to-a-grouple-table-cell myColorspace size_t num_locations 2 CGFloat locations 2 0.0 1.0 CGFloat components 8 0.8f 0.8f 0.8f 1.0f Bottom Colour Red Green Blue Alpha. 0.9f 0.9f 0.9f 1.0 Top Colour Red Green Blue Alpha. myColorspace CGColorSpaceCreateDeviceRGB myGradient.. 2 0.0 1.0 CGFloat components 8 0.8f 0.8f 0.8f 1.0f Bottom Colour Red Green Blue Alpha. 0.9f 0.9f 0.9f 1.0 Top Colour Red Green Blue Alpha. myColorspace CGColorSpaceCreateDeviceRGB myGradient CGGradientCreateWithColorComponents myColorspace components..
Overriding iPhone shutter sound through SDK http://stackoverflow.com/questions/2247227/overriding-iphone-shutter-sound-through-sdk replace this with my own custom sound I know it's possible because I've seen other apps from the App Store do it e.g. Red Laser . iphone camera uiimagepickercontroller share improve this question I am quite certain it's not possible. AFAIK.. . iphone camera uiimagepickercontroller share improve this question I am quite certain it's not possible. AFAIK Red Laser doesn't actually take a normal picture but uses UIGetScreenImage undocumented but nevertheless allowed for App Store..
Check if UIColor is dark or bright? http://stackoverflow.com/questions/2509443/check-if-uicolor-is-dark-or-bright
how to determine load application on iphone at first time? http://stackoverflow.com/questions/4153487/how-to-determine-load-application-on-iphone-at-first-time addSubview bbb.view if launchCount 2 NSLog @ this is the SECOND launch of the damn app do stuff here as you wish rrr Red alloc init window addSubview rrr.view window makeKeyAndVisible return YES here Red Blue are subclasses of uiviewcontroller.. app do stuff here as you wish rrr Red alloc init window addSubview rrr.view window makeKeyAndVisible return YES here Red Blue are subclasses of uiviewcontroller in both classes only one difference is that in void viewDidLoad self.view.backgroundcolor.. in both classes only one difference is that in void viewDidLoad self.view.backgroundcolor UIColor redColor in case of Red class in blue class which shows blue backgroundcolor but when i execute app its shows only blue color not show red color..
What determines the presence of the iPhone Location Services icon in the status bar? http://stackoverflow.com/questions/4413963/what-determines-the-presence-of-the-iphone-location-services-icon-in-the-status application ID has to do with the Location Services icon but I see no other cause for its persistence. It seems like a Red Herring hiding the real issue but I'm at a loss as to the real issue. iphone objective c core location share improve..
iPhone : How to change gradient color for negative values in Core Plot? http://stackoverflow.com/questions/5115961/iphone-how-to-change-gradient-color-for-negative-values-in-core-plot Plot in Core Plot in iPhone I want gradient colors as below For positive values to be Green For negative values to be Red . How should I do that iphone objective c cocoa touch ios4 core plot share improve this question Just implement the..
Change from RGB to HSB on iPhone? http://stackoverflow.com/questions/5589804/change-from-rgb-to-hsb-on-iphone float array min 0 max 0 for int i 1 i 3 i if array i array max max i if array i array min min i HSBColor colorWithRed float red Green float green Blue float blue HSBColor toReturn HSBColor alloc init autorelease float colorArray 3 colorArray.. 0 else toReturn.brightness colorArray max toReturn.saturation colorArray max colorArray min colorArray max if max 0 Red toReturn.hue colorArray 1 colorArray 2 colorArray max colorArray min 60 360 else if max 1 Green toReturn.hue 2.0 colorArray..
Objective-C: Asynchronously populate UITableView - how to do this? http://stackoverflow.com/questions/7491517/objective-c-asynchronously-populate-uitableview-how-to-do-this is some example code of what I'm trying to do I'm using ASIHttpRequest . self.listData NSArray alloc initWithObjects @ Red @ Green @ Blue @ Indigo @ Violet nil this works NSString urlStr NSString alloc initWithFormat @ http www.google.com some.. requestWithURL url request setDelegate self request setCompletionBlock ^ self.listData NSArray alloc initWithObjects @ Red @ Green @ Blue @ Indigo @ Violet nil this doesn't work... table reloadData request setFailedBlock ^ request startAsynchronous..
http://stackoverflow.com/questions/8063575/generate-colorful-qr-code QR Code Generator code to generate the QR code. now the qr code generated is always n black color.I want to make it in Red or any other color. The coding of coloring And the drawing of QR code .png image is done QR_Draw_png.mm file. What should..
how to to make gesturerecognizer working in an animating UIImage view http://stackoverflow.com/questions/8340329/how-to-to-make-gesturerecognizer-working-in-an-animating-uiimage-view @ 7 @ 9 @ 11 @ 27 @ 6 nil self.defaultImageCaption NSMutableArray alloc initWithObjects @ Ver @ Green @ Red @ CF @ Dwarf nil default image imageViewTop.alpha 1.0 imageViewBottom.alpha 0.0 imageViewBottom UIImageView alloc initWithFrame..
Draw a straight line using OpenGL ES in iPhone? http://stackoverflow.com/questions/9736887/draw-a-straight-line-using-opengl-es-in-iphone the line self.effect.useConstantColor GL_TRUE Make the line a cyan color self.effect.constantColor GLKVector4Make 0.0f Red 1.0f Green 1.0f Blue 1.0f Alpha I was able to get the line to draw by including a few more steps. It all involves sending..
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