cocoa-touch Archives - Page 3 of 13

cocoa, Programming

IT Nursery

How to get pixel data from a UIImage (Cocoa Touch) or CGImage (Core Graphics)?

I have a UIImage (Cocoa Touch). From that, I’m happy to get a CGImage or anything else you’d like that’s available. I’d like ...

May 31, 2022
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ios, Programming

IT Nursery

In Swift how to call method with parameters on GCD main thread?

In my app I have a function that makes an NSRURLSession and sends out an NSURLRequest using sesh.dataTaskWithRequest(req, completionHandler: {(data, response, error) In ...

May 30, 2022
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ios, Programming

IT Nursery

Is it possible to disable floating headers in UITableView with UITableViewStylePlain?

I’m using a UITableView to layout content ‘pages’. I’m using the headers of the table view to layout certain images etc. and I’d ...

May 30, 2022
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objective-c, Programming

IT Nursery

How does the new automatic reference counting mechanism work?

Can someone briefly explain to me how ARC works? I know it’s different from Garbage Collection, but I was just wondering exactly how ...

May 30, 2022
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objective-c, Programming

IT Nursery

capturing self strongly in this block is likely to lead to a retain cycle

How can I avoid this warning in xcode. Here is the code snippet:...

May 28, 2022
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ios, Programming

IT Nursery

Cropping an UIImage

I’ve got some code that resizes an image so I can get a scaled chunk of the center of the image – I ...

May 28, 2022
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ios, Programming

IT Nursery

Autoresizing masks programmatically vs Interface Builder / xib / nib

I was in an (probably false) assumption that enabling the right margin indicator in xib is equivalent to using UIViewAutoresizingFlexibleLeftMargin inside code and ...

May 28, 2022
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iphone, Programming

IT Nursery

How do I enter RGB values into Interface Builder?

How can I enter RGB or Hex color values for backgrounds in Interface Builder? I can select predefined colors but I would like ...

May 28, 2022
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iphone, Programming

IT Nursery

Gradients on UIView and UILabels On iPhone [duplicate]

This question already has answers here: Closed 9 years ago. Possible Duplicate: Manually drawing a gradient in iPhone apps? My application needs to ...

May 27, 2022
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Autolayout – intrinsic size of UIButton does not include title insets

If I have a UIButton arranged using autolayout, its size adjusts nicely to fit its content. If I set an image as button.image, ...

May 26, 2022
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