Comments on: UIKit/CoreGraphics vs. AppKit/Cocoa http://www.iphonexe.com/blog/?p=3 Ramblings and musings about the iPhone Fri, 10 Sep 2010 13:33:41 +0000 http://wordpress.org/?v=2.2.2 By: user http://www.iphonexe.com/blog/?p=3#comment-3650 user Thu, 18 Jun 2009 12:25:05 +0000 http://www.iphonexe.com/blog/?p=3#comment-3650 CGAffineTransform *cgAffineTransform = [[CGAffineTransformMakeTranslation(x, y)] retain]; is it possible????? CGAffineTransform *cgAffineTransform = [[CGAffineTransformMakeTranslation(x, y)] retain];

is it possible?????

]]> By: Raj http://www.iphonexe.com/blog/?p=3#comment-3633 Raj Wed, 21 Jan 2009 10:01:39 +0000 http://www.iphonexe.com/blog/?p=3#comment-3633 Hey nice insight :-) I have bookmarked your post at http://www.iphonekicks.com/cocoa/UIKit_CoreGraphics_vs_AppKit_Cocoa Hey nice insight :-) I have bookmarked your post at http://www.iphonekicks.com/cocoa/UIKit_CoreGraphics_vs_AppKit_Cocoa

]]> By: CGValueはないけれどNSValueが使えます | iPhoneアプリ開発ブログ http://www.iphonexe.com/blog/?p=3#comment-3624 CGValueはないけれどNSValueが使えます | iPhoneアプリ開発ブログ Wed, 03 Dec 2008 06:34:52 +0000 http://www.iphonexe.com/blog/?p=3#comment-3624 [...] CGValueはないけれどNSValueが使えます 2008 年 12 月 3 日 by 田中 CGRectやCGPointといったCoreGraphicsで定義された構造体をNSArrayなどに入れる場合、直感的にはCGValueというラッパが有りそうな気がします。しかし、実際にはCGValueというクラスは存在しません。調べてみるとAppleのDeveloperForums(英語)でズバリWrapper for CGRect?というトピックを発見しました。このトピックでのやり取りを要約すると、CGRectやCGPointでもNSValueが使えるということでした。どうやら回答者もこの質問を受けて初めて存在に気がついたようです。このことを調べていて知ったのですが、CocoaにはCGRectやCGPointと同等のNSRectやNSPointといったクラスが有るそうです。ただし、これはMac OS X(App Kit)のお話でiPhoneアプリには関係ないみたいです。逆に言うとApp Kitでの開発になれた人はCoreGraphicsで定義されているこれらを使うことになれる必要が有るでしょう。 [...] […] CGValueはないけれどNSValueが使えます 2008 年 12 月 3 日 by 田中 CGRectやCGPointといったCoreGraphicsで定義された構造体をNSArrayなどに入れる場合、直感的にはCGValueというラッパが有りそうな気がします。しかし、実際にはCGValueというクラスは存在しません。調べてみるとAppleのDeveloperForums(英語)でズバリWrapper for CGRect?というトピックを発見しました。このトピックでのやり取りを要約すると、CGRectやCGPointでもNSValueが使えるということでした。どうやら回答者もこの質問を受けて初めて存在に気がついたようです。このことを調べていて知ったのですが、CocoaにはCGRectやCGPointと同等のNSRectやNSPointといったクラスが有るそうです。ただし、これはMac OS X(App Kit)のお話でiPhoneアプリには関係ないみたいです。逆に言うとApp Kitでの開発になれた人はCoreGraphicsで定義されているこれらを使うことになれる必要が有るでしょう。 […]

]]> By: Scott http://www.iphonexe.com/blog/?p=3#comment-3577 Scott Sun, 16 Nov 2008 18:47:31 +0000 http://www.iphonexe.com/blog/?p=3#comment-3577 UIColor is close to NSColor so you don't need to go through a whole context setup. UIColor is close to NSColor so you don’t need to go through a whole context setup.

]]> By: admin http://www.iphonexe.com/blog/?p=3#comment-3520 admin Thu, 30 Oct 2008 00:45:28 +0000 http://www.iphonexe.com/blog/?p=3#comment-3520 dip: are you waiting until awakeFromNib has been called? It may cause some issues if you haven't. Also remember that this code is a bit outdated-it was written for the 1.1 toolchain iirc. The SDK and toolchain on 2.0 are completely different dip: are you waiting until awakeFromNib has been called? It may cause some issues if you haven’t. Also remember that this code is a bit outdated-it was written for the 1.1 toolchain iirc. The SDK and toolchain on 2.0 are completely different

]]> By: diiippp http://www.iphonexe.com/blog/?p=3#comment-3499 diiippp Mon, 20 Oct 2008 09:12:55 +0000 http://www.iphonexe.com/blog/?p=3#comment-3499 sorry i didn't explain that it happens when i add new view in nib file and when i try to get current context of newly added view. sorry i didn’t explain that it happens when i add new view in nib file and when i try to get current context of newly added view.

]]> By: diiippp http://www.iphonexe.com/blog/?p=3#comment-3498 diiippp Mon, 20 Oct 2008 05:18:13 +0000 http://www.iphonexe.com/blog/?p=3#comment-3498 I am using CGContextRef context = UIGraphicsGetCurrentContext(); to get current context, but context variable is not getting initialized. So i am not able to display lines. I have included CoreGraphics.framework. I am using CGContextRef context = UIGraphicsGetCurrentContext();

to get current context, but context variable is not getting initialized. So i am not able to display lines. I have included CoreGraphics.framework.

]]> By: Helder da Rocha http://www.iphonexe.com/blog/?p=3#comment-3411 Helder da Rocha Thu, 25 Sep 2008 02:34:23 +0000 http://www.iphonexe.com/blog/?p=3#comment-3411 Bezier paths in CG are called simply 'curves'. You can create bezier paths in CG using CGContextAddCurveToPoint (two control points) and CGContextAddQuadCurveToPoint (one control point) functions. They are used inside a path, so you should use those functions after a CGContextBeginPath(context) call. They are also relative to a 'current point', so you need at least an CGContextMoveToPoint(context, x0, y0) if you start the path with it. Using CGContextAddQuadCurveToPoint you obtain the same effect like this: CGContextMoveToPoint( context, ballRect.origin.x, // start pt ballRect.origin.y); CGContextAddQuadCurveToPoint( context, ballRect.origin.x + ballRect.size.width, // ctrl pt ballRect.origin.y + ballRect.size.height / 2, ballRect.origin.x + ballRect.size.height, // end pt ballRect.origin.x); (I may have missed something or confused clockwise with counter-clockwise, but something like this should work). Don't forget to CGContextStrokePath() or you'll see nothing. Bezier paths in CG are called simply ‘curves’. You can create bezier paths in CG using CGContextAddCurveToPoint (two control points) and CGContextAddQuadCurveToPoint (one control point) functions. They are used inside a path, so you should use those functions after a CGContextBeginPath(context) call. They are also relative to a ‘current point’, so you need at least an CGContextMoveToPoint(context, x0, y0) if you start the path with it.

Using CGContextAddQuadCurveToPoint you obtain the same effect like this:

CGContextMoveToPoint( context, ballRect.origin.x, // start pt ballRect.origin.y);

CGContextAddQuadCurveToPoint( context, ballRect.origin.x + ballRect.size.width, // ctrl pt ballRect.origin.y + ballRect.size.height / 2, ballRect.origin.x + ballRect.size.height, // end pt ballRect.origin.x);

(I may have missed something or confused clockwise with counter-clockwise, but something like this should work). Don’t forget to CGContextStrokePath() or you’ll see nothing.

]]> By: Matax http://www.iphonexe.com/blog/?p=3#comment-3334 Matax Tue, 02 Sep 2008 16:04:20 +0000 http://www.iphonexe.com/blog/?p=3#comment-3334 ok thanks anyway. I lear anyway a lot from your blog. thanks ok thanks anyway. I lear anyway a lot from your blog. thanks

]]> By: admin http://www.iphonexe.com/blog/?p=3#comment-3327 admin Tue, 02 Sep 2008 01:32:16 +0000 http://www.iphonexe.com/blog/?p=3#comment-3327 Matax, UIBezierPath does exist, but not in the iPhone SDK. It existed in a class-dump of the headers for the toolchain (jailbroken development). Unfortunately I can't post any SDK specific code or tutorials until Apple takes down their NDA (the agreement every developer is forced into if he wants to release his apps on the itunes app store). Matax,

UIBezierPath does exist, but not in the iPhone SDK. It existed in a class-dump of the headers for the toolchain (jailbroken development). Unfortunately I can’t post any SDK specific code or tutorials until Apple takes down their NDA (the agreement every developer is forced into if he wants to release his apps on the itunes app store).

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