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2014/10/15 ¤U¤È 10:16:09
iphone Programming Glossary: zeroRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates between UIKit and Core Graphics..
http://stackoverflow.com/questions/1106943/nscalendar-first-day-of-week
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview ancillary callout views but no way to provide a custom view for the callout bubble or to give it zero size or anything else. My idea was to override selectAnnotation deselectAnnotation in my MKMapViewDelegate..
Detect backspace in UITextField http://stackoverflow.com/questions/1977934/detect-backspace-in-uitextfield this question This may be a long shot but it could work. Try setting the text field's text to a zero width space character u200B . When backspace is pressed on a text field that appears empty it will actually..
Disabling implicit animations in -[CALayer setNeedsDisplayInRect:] http://stackoverflow.com/questions/2244147/disabling-implicit-animations-in-calayer-setneedsdisplayinrect switch over instantly. I've tried using CATransaction to turn off actions and set the duration to zero and neither work. Here's the code I'm using CATransaction begin CATransaction setDisableActions YES..
How to make a transparent UIWebView http://stackoverflow.com/questions/3646930/how-to-make-a-transparent-uiwebview Then just put a UIImageView behind the UIWebView. I've tried to set the UIwebView's opacity to zero in IB but it didn't help. Can you help me Thanks in advance iphone cocoa touch uiwebview share improve..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield it. Deleting single characters or cutting multiple characters is specified by a range with a non zero length and an empty string. Replacement is just a range deletion with a non empty string. share improve..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer shape with the visible path subtracted from it. You might want to investigate the fill methods non zero winding of even odd depending on how you created these paths. In essence to get the subpaths to subtract..
http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview You don't need to create the images inside it this reduces the reusability of the method to zero. To get your code working. Change the methods head 1. to UIImage maskImageMyImages Then change the name..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c of it and its reference count is decremented. If after calling release the reference count is now zero then that object's memory is freed by the system. The basic way this differs from malloc and free is.. it since we're the ones that created it. If we call release however the reference count will hit zero and bad memory will be returned to the caller. The answer is to call autorelease before returning the..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage bytesPerPixel unsigned char alpha rawData byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates between UIKit and Core Graphics i.e is the y axis inverted Or have I misunderstood premultiplied..
http://stackoverflow.com/questions/1106943/nscalendar-first-day-of-week
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview itself the mapkit only provides access to the left and right ancillary callout views but no way to provide a custom view for the callout bubble or to give it zero size or anything else. My idea was to override selectAnnotation deselectAnnotation in my MKMapViewDelegate and then draw my own custom view by making a call to..
Detect backspace in UITextField http://stackoverflow.com/questions/1977934/detect-backspace-in-uitextfield is already empty. iphone uitextfield share improve this question This may be a long shot but it could work. Try setting the text field's text to a zero width space character u200B . When backspace is pressed on a text field that appears empty it will actually delete your space. Then you can just reinsert the space...
Disabling implicit animations in -[CALayer setNeedsDisplayInRect:] http://stackoverflow.com/questions/2244147/disabling-implicit-animations-in-calayer-setneedsdisplayinrect the old to the new image using a cross fade. I'd like it to switch over instantly. I've tried using CATransaction to turn off actions and set the duration to zero and neither work. Here's the code I'm using CATransaction begin CATransaction setDisableActions YES self setNeedsDisplayInRect rect CATransaction commit Is there..
How to make a transparent UIWebView http://stackoverflow.com/questions/3646930/how-to-make-a-transparent-uiwebview to put the text in an .rtf file and display it in a UIWebView. Then just put a UIImageView behind the UIWebView. I've tried to set the UIwebView's opacity to zero in IB but it didn't help. Can you help me Thanks in advance iphone cocoa touch uiwebview share improve this question I recommend webView.opaque NO webView.backgroundColor..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer the visible path. Then close the path so that you create a shape with the visible path subtracted from it. You might want to investigate the fill methods non zero winding of even odd depending on how you created these paths. In essence to get the subpaths to subtract when you add them together you need to draw them or rather..
http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview This whole thing is a method which you are calling somewhere. You don't need to create the images inside it this reduces the reusability of the method to zero. To get your code working. Change the methods head 1. to UIImage maskImageMyImages Then change the name of the variable in 2. to UIImage maskImage UIImage imageNamed..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c By calling release you tell the object you are letting go of it and its reference count is decremented. If after calling release the reference count is now zero then that object's memory is freed by the system. The basic way this differs from malloc and free is that any given object doesn't need to worry about other parts.. count. The caller shouldn't be responsible for releasing it since we're the ones that created it. If we call release however the reference count will hit zero and bad memory will be returned to the caller. The answer is to call autorelease before returning the string. By explicitly calling autorelease we pass the responsibility..
How to restart app if it unexpectedly shutdown http://stackoverflow.com/questions/10395142/how-to-restart-app-if-it-unexpectedly-shutdown mechanism. Update Well I think I found something. @Malek_Jundi was half right. Your app should fail with non zero exit code but it should be registered as VoIP application. Because VoIP applications need to stay running in order to receive.. running in order to receive incoming calls the system automatically relaunches the application if it exits with a nonzero exit code. This could happen in cases where there is memory pressure and your application is terminated as a result. However..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage byteIndex 3 However I don't get the values I expect. For a completely black transparent area of the image I get non zero values for the alpha channel. Do I need to translate the co ordinates between UIKit and Core Graphics i.e is the y axis..
http://stackoverflow.com/questions/1106943/nscalendar-first-day-of-week
How to customize the callout bubble for MKAnnotationView? http://stackoverflow.com/questions/1565828/how-to-customize-the-callout-bubble-for-mkannotationview to the left and right ancillary callout views but no way to provide a custom view for the callout bubble or to give it zero size or anything else. My idea was to override selectAnnotation deselectAnnotation in my MKMapViewDelegate and then draw..
Detect backspace in UITextField http://stackoverflow.com/questions/1977934/detect-backspace-in-uitextfield share improve this question This may be a long shot but it could work. Try setting the text field's text to a zero width space character u200B . When backspace is pressed on a text field that appears empty it will actually delete your..
Disabling implicit animations in -[CALayer setNeedsDisplayInRect:] http://stackoverflow.com/questions/2244147/disabling-implicit-animations-in-calayer-setneedsdisplayinrect fade. I'd like it to switch over instantly. I've tried using CATransaction to turn off actions and set the duration to zero and neither work. Here's the code I'm using CATransaction begin CATransaction setDisableActions YES self setNeedsDisplayInRect..
How to make a transparent UIWebView http://stackoverflow.com/questions/3646930/how-to-make-a-transparent-uiwebview it in a UIWebView. Then just put a UIImageView behind the UIWebView. I've tried to set the UIwebView's opacity to zero in IB but it didn't help. Can you help me Thanks in advance iphone cocoa touch uiwebview share improve this question..
How to get audio volume level, and volume changed notifications on iOS 4? http://stackoverflow.com/questions/3651252/how-to-get-audio-volume-level-and-volume-changed-notifications-on-ios-4 does not make a lot of sense when the device is set to silence I want to disable it when the device's audio volume is zero. And subsequently reenable it when the volume is cranked up again. I am seeking a working and AppStore safe way to detect..
How many times do I release an allocated or retained object? http://stackoverflow.com/questions/3730804/how-many-times-do-i-release-an-allocated-or-retained-object objects when they have not been allocated yet. So I figured I need to check if its retainCount is greater than zero or not before I release it. My question is Do I just check if the retainCount is greater than zero and then release it if.. is greater than zero or not before I release it. My question is Do I just check if the retainCount is greater than zero and then release it if bg retainCount 0 bg release or Should I release it as many times as its retainCount while bg retainCount..
Bonjour over bluetooth WITHOUT Gamekit ? http://stackoverflow.com/questions/3844189/bonjour-over-bluetooth-without-gamekit you use regular BSD sockets to listen or connect. When writing a server you may even want to first listen on port 0 zero and then query which random available port was assigned to you. After querying for that announce this port instead of a..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer that you create a shape with the visible path subtracted from it. You might want to investigate the fill methods non zero winding of even odd depending on how you created these paths. In essence to get the subpaths to subtract when you add them..
Convert decimal to fraction in Objective-C? http://stackoverflow.com/questions/5552537/convert-decimal-to-fraction-in-objective-c t t m 0 0 ai m 0 1 m 0 1 m 0 0 m 0 0 t t m 1 0 ai m 1 1 m 1 1 m 1 0 m 1 0 t if realNumber double ai AF division by zero break realNumber 1 realNumber double ai if realNumber double 0x7FFFFFFF AF representation failure break ai maxDenominator..
http://stackoverflow.com/questions/5757386/how-to-mask-an-uiimageview you are calling somewhere. You don't need to create the images inside it this reduces the reusability of the method to zero. To get your code working. Change the methods head 1. to UIImage maskImageMyImages Then change the name of the variable..
AESCrypt decryption between iOS and PHP http://stackoverflow.com/questions/6461419/aescrypt-decryption-between-ios-and-php Can anyone see what I'm doing wrong php iphone ios encryption share improve this question Disclaimer I have zero iPhone development experience. Short answer what tc. said. Something is horribly wrong with the AES256EncryptWithKey Being..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c you are letting go of it and its reference count is decremented. If after calling release the reference count is now zero then that object's memory is freed by the system. The basic way this differs from malloc and free is that any given object.. for releasing it since we're the ones that created it. If we call release however the reference count will hit zero and bad memory will be returned to the caller. The answer is to call autorelease before returning the string. By explicitly..
Correct Singleton Pattern Objective C (iOS)? http://stackoverflow.com/questions/7598820/correct-singleton-pattern-objective-c-ios dealloc should never be called id retain return self NSUInteger retainCount return NSUIntegerMax That's soooo non zero MySingleton sharedInstance static MySingleton instance nil static dispatch_once_t predicate dispatch_once predicate ^ call..
Retain Cycles: Why is that such a bad thing? http://stackoverflow.com/questions/791322/retain-cycles-why-is-that-such-a-bad-thing the number of references pointing at it. Every time a reference is deleted the count goes down when the count gets to zero there are no references and so the object can be deleted. This usually takes care of itself and works ok without any careful.. it has to objects it owns will be dropped the objects being referenced will have their reference counts go to zero. They'll be deleted and the cascade will cause all objects to be deleted. But... if you have a cycle this cascade doesn't.. objects but because there is a cycle the objects reference each other. This means their reference counts never go to zero and they don't get deleted. This is a memory leak. Clearly you can do some careful management and break the cycles before..
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