I set base sdk 4.1 and ios deployment target = ios4.1. The contentScaleFactor is available in iOS 4.0 and later.I set base sdk 4.1 and ios deployment target =
阅读背景：
为什么[imageView respondsToSelector：@selector（contentScaleFactor :)]总是等于NO？
来源：互联网
分享到：
