以UILineBreakModeTailTruncation 、UITextAlignmentCenter 举例 修改如下:
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 60000
NSLineBreakMode lbm = NSLineBreakByTruncatingTail;
#else
UILineBreakMode lbm = UILineBreakModeTailTruncation;
#endif
#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 60000
NSTextAlignment ta = NSTextAlignmentCenter;
#else
UITextAlignment ta = UITextAlignmentCenter;
#endif