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What does “Receiver type 'CALayer' for instance message is a forward declaration” mean here?

I'm porting a block of code from an iOS4 project to iOS5 and I'm having some troubles with ARC. The code generates a PDF from a screen capture. ...
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JS Client-Side Exif Orientation: Rotate and Mirror JPEG Images

Digital camera photos are often saved as JPEG with an EXIF "orientation" tag. To display correctly, images need to be rotated/mirrored depending on which orientation is set, but browsers ignore this information rendering the image. Even in large commercial web apps, support for EXIF orientation can ...
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Adjust UILabel height depending on the text

... Don't forget that sizeWithFont is deprecated in iOS 7. stackoverflow.com/questions/18897896/… – attomos Jan 11 '14 at 10:48 7 ...
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How to design a multi-user ajax web application to be concurrently safe

... web page that shows a large amount of data from the server. The communication is done via ajax. 8 Answers ...
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Decode Base64 data in Java

...er, it seems that the printBase64Binary(..) method doesn't do the MIME version of Base64 ( en.wikipedia.org/wiki/Base64#MIME ), while the private Sun and the Commons implementations use this. Specifically, for String bigger than 76 characters, newlines are added. I didn't find how to configure JAXB'...
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What breaking changes are introduced in C++11?

...ges in C++11 that will cause some old code to stop compiling: the introduction of explicit operator bool() in the standard library, replacing old instances of operator void*() . Granted, the code that this will break is probably code that should not have been valid in the first place, but it's st...
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How do I call Objective-C code from Swift?

...ip to Step 5. (For some cases, I had to add an explicit #import <Foundation/Foundation.h to an older Objective-C File.) Step 1: Add Objective-C Implementation -- .m Add a .m file to your class, and name it CustomObject.m. Step 2: Add Bridging Header When adding your .m file, you'll likely be...
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Current location permission dialog disappears too quickly

My app takes the user's location, gets the co-ordinates , and provides a distance to or from their destination or origin. All these possible destinations are shown in a table view, so I'm getting the users co-ordinates at the same time as populating the table. The only thing is, the alert view that ...
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Can I specify multiple users for myself in .gitconfig?

...o use a specific user / email address which overrides the global configuration. From the root of the repo, run git config user.name "Your Name Here" git config user.email your@email.com whereas the default user / email is configured in your ~/.gitconfig git config --global user.name "Your Name ...
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Difference between framework and static library in xcode4, and how to call them

I am quite new to xcode and objective-c. I want to ask a very basic question. 2 Answers ...