Question

我有一个充满div的网站。在此div中，有两个元素YES和NO，同一个类名为foo。现在，当网站加载时，外包脚本会将类faa随机添加到元素YES或NO之一现在我在课程onclick上设置了foo个活动。

只要有人点击“是”或“否”，我就想将该类faa添加到该元素并将其从另一个元素中移除（如果需要。我的意思是他可以点击已经有这个类的元素）。

我知道如何为点击的类添加一个类。只是简单地说：

$(this).addClass('foo');

但是如何从其他元素中删除该类？

修改：

我想我描述得不是很好。

所以这是我的HTML结构的一个例子：

<div class="box">
    <a href="#" class="foo">YES</a>
    <a href="#" class="foo faa">NO</a>
</div>
<div class="box">
    <a href="#" class="foo">YES</a>
    <a href="#" class="foo">NO</a>
</div>
<div class="box">
    <a href="#" class="foo faa">YES</a>
    <a href="#" class="foo">NO</a>
</div>
<div class="box">
    <a href="#" class="foo">YES</a>
    <a href="#" class="foo">NO</a>
</div>
<div class="box">
    <a href="#" class="foo faa">YES</a>
    <a href="#" class="foo">NO</a>
</div>
<div class="box">
    <a href="#" class="foo">YES</a>
    <a href="#" class="foo faa">NO</a>
</div>

因此，如果有人点击第一个YES，那么只应从第一个div中的那个中删除类faa，而不是从所有这个中删除。

Answer 1

只需使用：

result[0] = x
result[1] = y
result[2] = z
result[3] = 
result[4] = a
result[5] = 
result[6] = 
result[7] = ";"
result[8] = b
result[9] = 1
result[10] = 2
result[11] = 3
result[12] = 
result[13] = 4
result[14] = 
result[15] = 
result[16] = ";"
result[17] = 5

Answer 2

是和否共享2件事：同一父母+同一类（foo）

所以你可以使用这2个标准来选择它们并删除＆＃34; faa＆＃34;类

import java.util.Locale;

import android.support.v7.app.ActionBarActivity;
import android.support.v7.app.ActionBar;
import android.support.v4.app.Fragment;
import android.support.v4.app.FragmentManager;
import android.support.v4.app.FragmentTransaction;
import android.support.v4.app.FragmentPagerAdapter;
import android.os.Bundle;
import android.support.v4.view.ViewPager;
import android.view.Gravity;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.TextView;

public class MainActivity extends ActionBarActivity implements
    ActionBar.TabListener {

/**
 * The {@link android.support.v4.view.PagerAdapter} that will provide
 * fragments for each of the sections. We use a {@link FragmentPagerAdapter}
 * derivative, which will keep every loaded fragment in memory. If this
 * becomes too memory intensive, it may be best to switch to a
 * {@link android.support.v4.app.FragmentStatePagerAdapter}.
 */
SectionsPagerAdapter mSectionsPagerAdapter;

/**
 * The {@link ViewPager} that will host the section contents.
 */
ViewPager mViewPager;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);

    // Set up the action bar.
    final ActionBar actionBar = getSupportActionBar();
    actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_TABS);

    // Create the adapter that will return a fragment for each of the three
    // primary sections of the activity.
    mSectionsPagerAdapter = new SectionsPagerAdapter(
            getSupportFragmentManager());

    // Set up the ViewPager with the sections adapter.
    mViewPager = (ViewPager) findViewById(R.id.pager);
    mViewPager.setAdapter(mSectionsPagerAdapter);

    // When swiping between different sections, select the corresponding
    // tab. We can also use ActionBar.Tab#select() to do this if we have
    // a reference to the Tab.
    mViewPager
            .setOnPageChangeListener(new ViewPager.SimpleOnPageChangeListener() {
                @Override
                public void onPageSelected(int position) {
                    actionBar.setSelectedNavigationItem(position);
                }
            });

    // For each of the sections in the app, add a tab to the action bar.
    for (int i = 0; i < mSectionsPagerAdapter.getCount(); i++) {
        // Create a tab with text corresponding to the page title defined by
        // the adapter. Also specify this Activity object, which implements
        // the TabListener interface, as the callback (listener) for when
        // this tab is selected.
        actionBar.addTab(actionBar.newTab()
                .setText(mSectionsPagerAdapter.getPageTitle(i))
                .setTabListener(this));
    }
}

@Override
public boolean onCreateOptionsMenu(Menu menu) {
    // Inflate the menu; this adds items to the action bar if it is present.
    getMenuInflater().inflate(R.menu.main, menu);
    return true;
}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    // Handle action bar item clicks here. The action bar will
    // automatically handle clicks on the Home/Up button, so long
    // as you specify a parent activity in AndroidManifest.xml.
    int id = item.getItemId();
    if (id == R.id.action_settings) {
        return true;
    }
    return super.onOptionsItemSelected(item);
}

@Override
public void onTabSelected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
    // When the given tab is selected, switch to the corresponding page in
    // the ViewPager.
    mViewPager.setCurrentItem(tab.getPosition());
}

@Override
public void onTabUnselected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
}

@Override
public void onTabReselected(ActionBar.Tab tab,
        FragmentTransaction fragmentTransaction) {
}

/**
 * A {@link FragmentPagerAdapter} that returns a fragment corresponding to
 * one of the sections/tabs/pages.
 */
public class SectionsPagerAdapter extends FragmentPagerAdapter {

    public SectionsPagerAdapter(FragmentManager fm) {
        super(fm);
    }

    @Override
    public Fragment getItem(int position) {
        // getItem is called to instantiate the fragment for the given page.
        // Return a PlaceholderFragment (defined as a static inner class
        // below).
        return PlaceholderFragment.newInstance(position + 1);
    }

    @Override
    public int getCount() {
        // Show 3 total pages.
        return 3;
    }

    @Override
    public CharSequence getPageTitle(int position) {
        Locale l = Locale.getDefault();
        switch (position) {
        case 0:
            return getString(R.string.title_section1).toUpperCase(l);
        case 1:
            return getString(R.string.title_section2).toUpperCase(l);
        case 2:
            return getString(R.string.title_section3).toUpperCase(l);
        }
        return null;
    }
}

/**
 * A placeholder fragment containing a simple view.
 */
public static class PlaceholderFragment extends Fragment {
    /**
     * The fragment argument representing the section number for this
     * fragment.
     */
    private static final String ARG_SECTION_NUMBER = "section_number";

    /**
     * Returns a new instance of this fragment for the given section number.
     */
    public static PlaceholderFragment newInstance(int sectionNumber) {
        PlaceholderFragment fragment = new PlaceholderFragment();
        Bundle args = new Bundle();
        args.putInt(ARG_SECTION_NUMBER, sectionNumber);
        fragment.setArguments(args);
        return fragment;
    }

    public PlaceholderFragment() {
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
            Bundle savedInstanceState) {
        View rootView = inflater.inflate(R.layout.news_frag, container,
                false);
        return rootView;
    }
}

}

Answer 3

在问题更新后编辑：

//remove "faa" class to all children of "this"'s parent with box class :
$(this).closest('.box').find('.faa').removeClass('faa');

Answer 4

试试这个：点击foo的事件，删除faa类的同级foo元素，然后添加课程faa以点击foo div，如图所示以下

$(function(){
  $('.foo').click(function(event){
     event.preventDefault();
     $(this).siblings('.foo').removeClass('faa');
     $(this).addClass('faa');
  });
});

<强> JSFiddle Demo for add / remove class

有关 siblings()

的更多信息

Answer 5

您需要从点击元素的兄弟中移除类faa。然后，您需要将类faa添加到单击的元素。

$('.foo').click(function(){
  $(this).siblings().removeClass('faa');
  $(this).addClass('faa');
});

请参阅jsFiddle

从部分中删除其他类

5 个答案: