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brocoo/Extensions.swift

Created July 23, 2015 11:34
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  1. brocoo created this gist Jul 23, 2015.
    13 changes: 13 additions & 0 deletions Extensions.swift
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,13 @@
    // MARK: - NSUserDefaults

    extension NSUserDefaults {

    class func performOnceForKey(key: String, perform: () -> Void, elsePerform: (() -> Void)? = nil) {
    let once = self.standardUserDefaults().objectForKey(key)
    self.standardUserDefaults().setBool(true, forKey: key)
    self.standardUserDefaults().synchronize()

    if once == nil { perform() }
    else { elsePerform?() }
    }
    }