UITextField 限制用户输入小数点后位数的方法

UITextField 限制用户输入小数点后位数的方法

位数限制: limited

在UITextField的代理方法中添加类似如下代码
- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{NSMutableString * futureString = [NSMutableString stringWithString:textField.text];[futureString  insertString:string atIndex:range.location];NSInteger flag=0;const NSInteger limited = 1;for (int i = futureString.length-1; i>=0; i--) {if ([futureString characterAtIndex:i] == '.') {if (flag > limited) {return NO;}break;}flag++;}return YES;
}