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}" ;NSPredicate *emailTest = [ NSPredicate predicateWithFormat : @"SELF MATCHES%@",emailRegex];return [emailTest evaluateWithObject :ema Read More
1.定义一个字符串a, 截取a 的某一个部分，复制给b, b必须是int型NSString*a =@"1.2.30";intb= [[asubstringWithRange:NSMakeRange(4,2)]intValue];NSLog(@"a:%@\n",a);NSLog(@"b:%d",b);Output :2011-07-05 11:49:08.170 Q[4005:207] a:1.2.30 2011-07-05 11:49:08.172 Q[4005:207] b:30解析如下：substringWithRange: 专门 Read More