ios TextField限制输入两位小数

只需要实现textField的这个代理方法就可以实现

- (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 = 2;//小数点后需要限制的个数

    

    for (int i = futureString.length-1; i>=0; i--) {

        

        

        if ([futureString characterAtIndex:i] == '.') {

            

            

            

            if (flag > limited) {

                

                return NO;

                

            }

            

 

            break;

            

        }

        

        flag++;

        

    }

    

    

    

    return YES;

    

    

}

楼主亲测好使！