ios – UIColor – getRed：… – 引发异常

我有以下测试代码：

CGFloat endRed,endGreen,endBlue,endAlpha;

[[UIColor greenColor] getRed:&endRed green:&endGreen blue:&endBlue alpha:&endAlpha];

我调用一个UIView类的drawRect方法.
此代码失败,异常

2011-11-06 02:29:28.671 Chartous[13457:b303] -[UICachedDeviceRGBColor getRed:green:blue:alpha:]: unrecognized selector sent to instance 0x4e7ea10
2011-11-06 02:29:28.673 Chartous[13457:b303] *** Terminating app due to uncaught exception 'NSinvalidargumentexception',reason: '-[UICachedDeviceRGBColor getRed:green:blue:alpha:]: unrecognized selector sent to instance 0x4e7ea10'

这里有什么问题？

解决方法

此方法仅在ios5和更高版本中可用.您是否在模拟器或设备上的早期iOS版本上运行它？我假设给你的问题的标签.