获取ios 安卓应用版本号

安卓：

/**
 * 获取版本号
 * @return 当前应用的版本号
 */
public String getVersion() {
    try {
        PackageManager manager = this.getPackageManager();
        PackageInfo info = manager.getPackageInfo(this.getPackageName(), 0);
        String version = info.versionName;
        return this.getString(R.string.version_name) + version;
    } catch (Exception e) {
        e.printStackTrace();
        return this.getString(R.string.can_not_find_version_name);
    }
}

ios:

NSDictionary* infoDict =[[NSBundle mainBundle] infoDictionary];
NSString* versionNum =[infoDict objectForKey:@"CFBundleVersion"];