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2014/10/15 ¤U¤È 10:08:47
iphone Programming Glossary: factRetrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage premultiplied alpha values Update @Nikolai Ruhe's suggestion was key to this. I did not in fact need to translate between UIKit coordinates and Core Graphics coordinates. However after setting the..
Difference between objectForKey and valueForKey? http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey of statements. I know you're thinking wow but sarcastically. KVC doesn't look all that useful. In fact it looks wordy . But when you want to change things at runtime you can do lots of cool things that are..
Javascript for “Add to Home Screen” on iPhone? http://stackoverflow.com/questions/1141979/javascript-for-add-to-home-screen-on-iphone the builtin UI and that Apples does not provide anyway to do this from scripts within a page. In fact I am pretty sure there is no mechanism for doing this on the desktop version of Safari either. share..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone plain encoding NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into an NSString it may be more convenient to write..
Core Data - Storing Images (iPhone) http://stackoverflow.com/questions/2090028/core-data-storing-images-iphone store. You can use the transformable data type to store the NSImage directly into Core Data. In fact you can use the transformable data type to store anything that implements the NSCoder protocol. Personally..
Is MonoTouch now banned on the iPhone? [closed] http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone apps compiled using MonoTouch a tool that compiles C# and .NET apps to the iPhone. Does this in fact ban the use of Monotouch for the IPhone iphone monotouch share improve this question Update This..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the..
http://stackoverflow.com/questions/4168327/what-is-nszombie haystack searches. You can read more over at Cocoa Dev . The name is a fairly obvious play on the fact that objects are normally considered dead when they reach retain count 0. With this setting they continue..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage Core Graphics i.e is the y axis inverted Or have I misunderstood premultiplied alpha values Update @Nikolai Ruhe's suggestion was key to this. I did not in fact need to translate between UIKit coordinates and Core Graphics coordinates. However after setting the blend mode my alpha values were what I expected CGContextSetBlendMode..
Difference between objectForKey and valueForKey? http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey valueForKey @ accountNumber Those are equivalent sets of statements. I know you're thinking wow but sarcastically. KVC doesn't look all that useful. In fact it looks wordy . But when you want to change things at runtime you can do lots of cool things that are much more difficult in other languages but this is beyond..
Javascript for “Add to Home Screen” on iPhone? http://stackoverflow.com/questions/1141979/javascript-for-add-to-home-screen-on-iphone
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone plain description UTF8String printf s n NSString alloc initWithData plain encoding NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into an NSString it may be more convenient to write two methods that wrap the functionality you need in forward..
Core Data - Storing Images (iPhone) http://stackoverflow.com/questions/2090028/core-data-storing-images-iphone 1 mb store on disk and reference the path in your Core Data store. You can use the transformable data type to store the NSImage directly into Core Data. In fact you can use the transformable data type to store anything that implements the NSCoder protocol. Personally I would not convert it to a CGImageRef as you can lose..
Is MonoTouch now banned on the iPhone? [closed] http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone Flash Professional CS5 release are prohibited. This also bans apps compiled using MonoTouch a tool that compiles C# and .NET apps to the iPhone. Does this in fact ban the use of Monotouch for the IPhone iphone monotouch share improve this question Update This changed recently . MonoTouch should no longer conflict with..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c Objective C 2.0 practice is to use the same name for the ivar as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow...
http://stackoverflow.com/questions/4168327/what-is-nszombie problems without advanced tools or painstaking needle in haystack searches. You can read more over at Cocoa Dev . The name is a fairly obvious play on the fact that objects are normally considered dead when they reach retain count 0. With this setting they continue to exist in a strange half life neither living nor quite..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c Objective C 2.0 practice is to use the same name for the ivar as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's the pattern they expect you to follow...
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c of the event loop it can call release on the object. From our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased object. For example in the following..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d Q. Photoshop calls this transformation Distort. But according to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using a CATransform3D 4x4 matrix. Do you have any hints on how..
Retrieving a pixel alpha value for a UIImage http://stackoverflow.com/questions/1042830/retrieving-a-pixel-alpha-value-for-a-uiimage Or have I misunderstood premultiplied alpha values Update @Nikolai Ruhe's suggestion was key to this. I did not in fact need to translate between UIKit coordinates and Core Graphics coordinates. However after setting the blend mode my alpha..
Difference between objectForKey and valueForKey? http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey are equivalent sets of statements. I know you're thinking wow but sarcastically. KVC doesn't look all that useful. In fact it looks wordy . But when you want to change things at runtime you can do lots of cool things that are much more difficult..
Javascript for “Add to Home Screen” on iPhone? http://stackoverflow.com/questions/1141979/javascript-for-add-to-home-screen-on-iphone home screen is with the builtin UI and that Apples does not provide anyway to do this from scripts within a page. In fact I am pretty sure there is no mechanism for doing this on the desktop version of Safari either. share improve this answer..
http://stackoverflow.com/questions/12539697/iphone-5-css-media-query useful media feature is device aspect ratio . Note that the iPhone 5 does not have a 16 9 aspect ratio . It is in fact 40 71. iPhone 5 @media screen and device aspect ratio 2 3 iPhone 5 @media screen and device aspect ratio 40 71 iPad @media..
AES Encryption for an NSString on the iPhone http://stackoverflow.com/questions/1400246/aes-encryption-for-an-nsstring-on-the-iphone NSString alloc initWithData plain encoding NSUTF8StringEncoding UTF8String pool drain return 0 Given this code and the fact that encrypted data will not always translate nicely into an NSString it may be more convenient to write two methods that..
Core Data - Storing Images (iPhone) http://stackoverflow.com/questions/2090028/core-data-storing-images-iphone path in your Core Data store. You can use the transformable data type to store the NSImage directly into Core Data. In fact you can use the transformable data type to store anything that implements the NSCoder protocol. Personally I would not convert..
Orientation in a UIView added to a UIWindow http://stackoverflow.com/questions/2508630/orientation-in-a-uiview-added-to-a-uiwindow here Technical Q A QA1688 Why won't my UIViewController rotate with the device In your situation its probably the fact that you are adding the view as another subview to the window. Only the first subview gets the rotation events. What you..
Is MonoTouch now banned on the iPhone? [closed] http://stackoverflow.com/questions/2604033/is-monotouch-now-banned-on-the-iphone This also bans apps compiled using MonoTouch a tool that compiles C# and .NET apps to the iPhone. Does this in fact ban the use of Monotouch for the IPhone iphone monotouch share improve this question Update This changed recently ...
Remove gradient background from UIWebView? http://stackoverflow.com/questions/3009063/remove-gradient-background-from-uiwebview 0 methods so if Apple re order the children of the webView control it will work fine but still relies on the fact that the gradient effect is applied by imageviews parented to the scroll view and that there is indeed a scrollview underpinning..
Prefixing property names with an underscore in Objective C [duplicate] http://stackoverflow.com/questions/3521254/prefixing-property-names-with-an-underscore-in-objective-c name for the ivar as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's..
Set padding for UITextField with UITextBorderStyleNone http://stackoverflow.com/questions/3727068/set-padding-for-uitextfield-with-uitextborderstylenone with UITextBorderStyleNone I wanted to use a custom background for my UITextFields . This works fine except for the fact that I have to use UITextBorderStyleNone to make it look pretty. This forces the text to stick to the left without any padding...
http://stackoverflow.com/questions/4168327/what-is-nszombie needle in haystack searches. You can read more over at Cocoa Dev . The name is a fairly obvious play on the fact that objects are normally considered dead when they reach retain count 0. With this setting they continue to exist in a..
http://stackoverflow.com/questions/4194394/client-server-gksessions mode. This is confusing because if you are new to networking programming it would make you think that is normal . In fact it is very likely you will never use the P2P mode at all when making real normal games. To repeat If you are new to networking.. mentions of P2P mode in Apple's doco it's important to realise that the amazing P2P feature is more of a novelty. In fact for essentially all game networking you will definitely need normal everyday client server spoke style networking. Just..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone and behaviors. With collections or SQL you have manually manage complexity and can find yourself quickly swamped. In fact I have seen people trying manage complex data with SQL who end up writing their own miniature Core Data stack. Needless.. data in and out of persistence it's integration with the rest of the API usually produces superior results when you factor in speed of development and reliability. In this particular case I can't tell from the description whether you are in..
Difference between protocol and delegates? http://stackoverflow.com/questions/5431413/difference-between-protocol-and-delegates a UITextField using the delegate property you'd better make sure that this class conforms to UITextFieldDelegate . In fact because the delegate property of UITextField is defined as @property nonatomic assign id UITextFieldDelegate delegate Then..
Property vs instance variable in Objective-C [duplicate] http://stackoverflow.com/questions/6146244/property-vs-instance-variable-in-objective-c name for the ivar as the property. You can optionally assign a different ivar in the @property declaration but the fact that by default synthesized accessors for a property will access the ivar with the same name as the property indicates that's..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c on the object. From our perspective as programmers it takes care of calling release for us so we don't have to and in fact we shouldn't . What's important to note is that again by convention all object creation class methods return an autoreleased..
Transforming a rectangle image into a quadrilateral using a CATransform3D http://stackoverflow.com/questions/9470493/transforming-a-rectangle-image-into-a-quadrilateral-using-a-catransform3d Distort. But according to the source of this quadrilateral the perspective of the image moving in space it is in fact the combination of a scale a rotation and a perspective matrix. I am wondering if this is possible using a CATransform3D..
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