判断字符串是纯数字
- (BOOL)isPureNumandCharacters:(NSString *)string
{
string = [string stringByTrimmingCharactersInSet:[NSCharacterSet decimalDigitCharacterSet]];
if(string.length > 0)
{
return NO;
}
return YES;
}
判断字符串是纯字母(大写和小写)
-(BOOL)PureLetters:(NSString*)str{
for(int i=0;i<str.length;i++){
unichar c=[str characterAtIndex:i];
if((c<'A'||c>'Z')&&(c<'a'||c>'z'))
return NO;
}
return YES;
}
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