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How to map IMAP folders in Mac Mail

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I have been driven nuts on several occasions by the likes of Yahoo: change your password, and you have to tell every single device, sometimes several times. If everything fails, delete the email account completely and add it again afresh.

This presents a problem: your SENT or DRAFT items may no longer be where they after adding your email account again. There is of course a way to map those IMAP folder, but if you’re like me you hardly ever use this option and forget when it’s time to do it again.

So here’s how to do it – perhaps it helps before checking yourself into the local nut house.

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How to reverse a BOOL in Objective C

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Sometimes you need the opposite of a BOOL. This is actually easier than I had expected – because the opposite of YES is !YES and the opposite of NO is !NO. More examples here: http://stackoverflow.com/questions/6829573/reversing-a-bool

How to detect changes in iCloud Key/Value Data

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Now that we can read from and write to iCloud, how will we know when another device may have written new data? We’ll do this by adding an observer and listening to a special message iCloud transmits every time new data is available. The message has the catchy title NSUbiquitousKeyValueStoreDidChangeExternallyNotification. Here’s how we can setup […]

How to use iCloud to store Key/Value Data

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Using iCloud as Key/Value storage is almost identical to NSUserDefaults, except it populates to iCloud in the background and can be read from any device on the same account. What I find much harder than the code is how to make this work in Xcode. Here’s what we need: an App ID that has iCloud […]