Comments on: Fun With UIButtons and Core Animation Layers

By: psychoh13

psychoh13 — Sun, 29 May 2011 16:24:10 +0000

You should not use -drawRect: to setup up properties of a CALayer ! The job of that method is only to DRAW content, never to setup properties, especially of a layer, when you know that drawRect: is specifically called from a layer's drawLayer:inContext: method. This is dangerous and counter-productive.

This property of the CAGradientLayer should be set when the user sets the low or high colour, and only then.

By: Instruments alleges Memory leak with [UIColor CGColor] - Applerr.com All about Apple Products - Applerr.com All about Apple Products

Sat, 14 May 2011 11:00:54 +0000

[...] PS: I got the code for the GradientView from somewhere some months ago; it works very well (other than exposing the aforementioned memory leak). You can find the code here. [...]

By: UIButton?????? » nonomura.jp

UIButton?????? » nonomura.jp — Tue, 10 May 2011 18:27:40 +0000

[...] ????????UIButton???????? ????????????????? [...]

By: Mobile Design 1 « iphone swing

Mobile Design 1 « iphone swing — Mon, 31 Jan 2011 08:35:31 +0000

[...] http://www.cimgf.com/2010/01/28/fun-with-uibuttons-and-core-animation-layers/ [...]

By: Jeff

Jeff — Thu, 13 Jan 2011 18:30:29 +0000

Hi ,

This is a Great work, I have tried it out, it works great,

However, when I added to UITableCellView, it does not work.

any idea?

By: tuyennguyencanada

tuyennguyencanada — Fri, 05 Nov 2010 14:56:26 +0000

Thank you for your post. I find it very useful for my project.

By: ios-dev

ios-dev — Sun, 31 Oct 2010 03:24:06 +0000

Fun With UIButtons and Core Animation Layers...

...

By: links for 2010-08-30 | Alones world

links for 2010-08-30 | Alones world — Tue, 31 Aug 2010 01:35:10 +0000

[...] Cocoa Is My Girlfriend » Fun With UIButtons and Core Animation Layers (tags: uibutton cocoa core animation layer) [...]

By: stevek123

stevek123 — Sat, 14 Aug 2010 04:51:36 +0000

Also, if I switch the “colorWithRed…” code back to “redColor” or the like, it works regardless of how you arrived at the ColorfulButtonsViewController class.

By: stevek123

stevek123 — Sat, 14 Aug 2010 03:29:38 +0000

This is great. Thanks. However, I have a problem. If I call ColorfulButtonsViewController from the main delegate as a:

[window addSubView:viewController.view];

I can send colorWithRed:126.0/255.0 green:179.0/255.0 blue:27.0/255.0 alpha:1.0]]; or the like in the setHighColor call and everthing works fine.

However, if the main delegate calls a UINavigationController which in turn calls the exact same class with a:

[self.navigationController pushViewController:buttonViewController animateed:YES];

the same code results in an EXC_BAD_ACCESS crash. It is crashing on in the drawRect procedure in the ColorfulButton class. I can hardcode the [UIColor colorWithRed... into the gradientLayer call and it works, when I try to pass "colorWithRed..." in setHighColor or setLowColor is crashes.

Again, the exact same code runs correctly if I don't go through the UINavigationController.

Any help would be appreciated. Thanks.

(did I mention it's the same class code).

By: gmaletic

gmaletic — Sun, 01 Aug 2010 09:19:46 +0000

I noticed this class doesn’t work if you try to instantiate the ColorfulButton directly, rather than go through Interface Builder. I have some ideas, but how would you attempt to fix this limitation? Thanks.

By: sfsam

sfsam — Wed, 09 Jun 2010 07:08:37 +0000

This is very neat, but how can you set different background colors for the different states (disabled, highlighted, etc)?

By: Bynomial Code » Fun with layers

Bynomial Code » Fun with layers — Sat, 08 May 2010 23:15:00 +0000

[...] I originally learned about this stuff from this blog post. [...]

By: TechnologySolutionsGroup

TechnologySolutionsGroup — Wed, 31 Mar 2010 19:44:55 +0000

Thanks for the great code!

I however had an access violation, and had to change to the following:

@property (nonatomic, retain) UIColor *_highColor; @property (nonatomic, retain) UIColor *_lowColor;

You had (assign) instead, and in "drawRect" the colors were no longer accessible.

I had a CustomerButton on two different view controllers. The first one showed fine, but when navigating to the second one, the crash would occur.

Both view controllers were in separate nib's.

Thanks, Scott

By: akdalim@yahoo.com

akdalim@yahoo.com — Tue, 30 Mar 2010 12:04:28 +0000

I got it. the code needs to add the lib,

import

(You should write this for the newbies like me :). It took a long to figure it out. I had QuartzCore and CoreGraphics framework imported, but still need the .h file.

Thanks for the tutorial. its great!

By: akdalim@yahoo.com

akdalim@yahoo.com — Tue, 30 Mar 2010 09:57:53 +0000

hi, I have tried to make rounded rectangle button, but the color is not changed and have the following warning in these lines that : no -setCornerRadius etc. method found.

[[loginButton layer] setCornerRadius:8.0f]; [[loginButton layer] setMasksToBounds:YES]; [[loginButton layer] setBorderWidth:1.0f]; [[loginButton layer] setBackgroundColor: [COLOR_BUTTON_LOGIN CGColor] ];

By: Gejat: kleuren UIButtons

Gejat: kleuren UIButtons — Thu, 25 Mar 2010 10:00:10 +0000

[...] zijn andere oplossingen (bijvoorbeeld met “gestretchde-png-files”) en ik vond deze ook erg charmant maar uiteindelijk vind ik dit gewoon het [...]

By: Dan

Dan — Fri, 12 Mar 2010 16:26:13 +0000

Nice! I actually didn’t realize this consequence of UIView being layer-based and instead wrote a tiny category that added a class-method to UIImage in order to easily generate glass-style-/gradient-buttons in code…

I have to say I pretty much prefer doing it your way — it feels much more…appropriate.

By: 2010-03-03 ???? iphone xml????

2010-03-03 ???? iphone xml???? — Wed, 03 Mar 2010 05:18:28 +0000

[...] Fun With UIButtons and Core Animation Layers [...]

By: JordanX

JordanX — Tue, 02 Mar 2010 14:56:31 +0000

Great post. Adding a drop shadow would really complete this class. But as it is. Great Job!

First time reader. Love the blog!