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March 12, 2017 01:08
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random number from range
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| extension UInt32 { | |
| static func random(_ range: Range<UInt32>) -> UInt32 { | |
| return arc4random_uniform(range.upperBound - range.lowerBound) + range.lowerBound | |
| } | |
| } | |
| extension CGFloat { | |
| static func random(_ range: Range<CGFloat>) -> CGFloat { | |
| return CGFloat(arc4random()) / CGFloat(UINT32_MAX) * (range.upperBound - range.lowerBound) + range.lowerBound | |
| } | |
| } |
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