在iOS7之前如果需要隱藏StatusBar，比較簡單，直接在AppDelegate.cs中使用如下代碼就可以進行隱藏：

UIApplication.SharedApplication.StatusBarHidden = true;

但這段代碼在iOS7中卻無法實現StatusBar隱藏，而是將StatusBar透明顯示。經過在Xamarin網站查詢向導，具體方法是為UIViewController增加一個重寫方法，

public override bool PrefersStatusBarHidden ()
{
    return true;
}

這樣就可以進行隱藏了，完成后效果如下圖所示：

在實際代碼編寫的時候為了方便起見，可以建立一個ViewController的類，繼承UIViewController類，增加 StatusBarHidder的方法，以后再新增UIViewController的時候都繼承ViewController即可。具體代碼如下：

using System;
using System.Drawing;

using MonoTouch.CoreFoundation;
using MonoTouch.UIKit;
using MonoTouch.Foundation;

namespace Com.imStudio.iOSLibrarys
{
    [Register("ViewController")]
    public class ViewController : UIViewController
    {
        public Boolean StatusBarHidder { get; set; }

        public ViewController()
        {
        }

        public override void DidReceiveMemoryWarning()
        {
            // Releases the view if it doesn't have a superview.
            base.DidReceiveMemoryWarning();

            // Release any cached data, images, etc that aren't in use.
        }

        public override bool PrefersStatusBarHidden()
        {
            return this.StatusBarHidder;
        }

        public override void ViewDidLoad()
        {
            base.ViewDidLoad();

            // Perform any additional setup after loading the view
        }
    }
}

Xamarin試用版下載

By博客園宋海鵬