iOS.NS_DEPRECATED_IOS

如何处理被NS_DEPRECATED_IOS标记的selector， 例如：类

AVAudioSession中有：

- (BOOL)setPreferredHardwareSampleRate:(double)sampleRate error:(NSError **)outError NS_DEPRECATED_IOS(3_0, 6_0);

那么App需要支持iOS5到iOS7，那么该如何处理这种case呢？

Solution A:

 AVAudioSession *asession = [AVAudioSession  sharedInstance];

 if ([asession respondsToSelector:@selector(newSelector:)])

{

　　[asession newSelector:];

}

else 

{

　　[asession oldSelector:];

}

Maybe Solution B...

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