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//判断字符串是否为空 #define NULLString(string) ([string isEqualToString:@""] || (string == nil) || [string isEqualToString:@""] || [string isKindOfClass:[NSNull class]])
判读字符串是否为空的全局宏-分享
原文地址:http://www.cnblogs.com/wq-gril/p/5630120.html