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johnnyclem/gist:20f676f0c580de007efa

Created June 12, 2014 19:03
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gistfile1.swift
let notificationCenter = NSNotificationCenter.defaultCenter()
notificationCenter.addObserver(
self,
selector: "textFieldTextChanged:",
name:UITextFieldTextDidChangeNotification,
object: nil
)
func textFieldTextChanged(sender : AnyObject) {
sendButton.enabled = messageField.text.utf16count > 0
}
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