可能重复:
.NIB - > .XIB有什么用?
我想知道xib和nib之间有什么区别,我知道像xib = xml接口构建器和nib是下一个接口构建器,但我不清楚两者之间的区别,请帮助我.
提前致谢.
谁能告诉我如何计算1<<0和其他人的价值?我是iOS的新手,我很难理解它.
kSCNetworkReachabilityFlagsTransientConnection = 1<<0,
kSCNetworkReachabilityFlagsReachable = 1<<1,
kSCNetworkReachabilityFlagsConnectionRequired = 1<<2,
kSCNetworkReachabilityFlagsConnectionOnTraffic = 1<<3,
kSCNetworkReachabilityFlagsInterventionRequired = 1<<4,
kSCNetworkReachabilityFlagsConnectionOnDemand = 1<<5, //
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