摘要:
1.判断邮箱格式是否正确的代码://利用正则表达式验证-(BOOL)isValidateEmail:(NSString*)email{NSString*emailRegex =@"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";NSPredicat... 阅读全文
摘要:
一个基本的该类型字符串例子:@"This is a constant character string object";在后台显示它:NSLog (@"%@", @"This is a constant character string object");得到其长度:int len = [@"Hel... 阅读全文