How to set a label's preferredMaxLayoutWidth to automatic programmatically?

Question

I get the following errors when I attempt to set a label\'s Preferred Width to Automatic in a storyboard:

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Answer 1

I haven't figured out a way to do this programmatically, but there is a pretty decent workaround.

Any valid workaround must meet these requirements:

• Use automatic preferredMaxLayoutWidth on iOS 8, and explicit on iOS 7.
• Must not have warnings.

The only way to set preferredMaxLayoutWidth to automatic is via a storyboard, so we do so.

In order to suppress the above warning, set the number of Lines to 1.

Now, programmatically, do the following:

self.label.numberOfLines = 0;
if (iOS8) {
    ; // do nothing, it will use automatic via the storyboard
} else {
    self.label.preferredMaxLayoutWidth = screenWidth - 32;
}

For reference, here is how to find out the iOS version, and here is how to get the screen width. Note that you must specifically look for iOS 8 and not whether or not the object responds to preferredMaxLayoutWidth, since that property was added in iOS 6.