background-foreground | 易学教程

How to change the highlighted text's Foreground color for a WPF TextBox?

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I am working on an application having both WinForms and WPF controls; In case of WinForms TextBox selected text Background color comes Blue and White respectively whereas in WPF TextBox it is LightBlue and Black. As answered in these questions I can use SelectionBrush property(WPF 4) to change the selected text's background, but How can I change the foreground color of selected text? How can you change the highlighted text color for a WPF TextBox? How can I change the highlighted text color for a TextBox? You cannot, the control does not allow for it. 来源： https://stackoverflow.com/questions

how to remove background image and get fore image

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问题 there are two images alt text http://bbs.shoucangshidai.com/attachments/month_1001/1001211535bd7a644e95187acd.jpg alt text http://bbs.shoucangshidai.com/attachments/month_1001/10012115357cfe13c148d3d8da.jpg one is background image another one is a person's photo with the same background ,same size,what i want to do is remove the second image's background and distill the person's profile only. the common method is subtract first image from the second one,but my problem is if the color of

iphone 4 sdk : detect return from background mode

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问题 How can I detect that an app has just returned from "background mode"? I mean, I don't want my app to fetch data (each 60 sec) when the user press the "home button". But, I'd like to make some "special" update the first time the app is in foreground mode. How can I detect these two events: app going to background mode app going to foreground mode Thanks in advance. François 回答1: Here's how to listen for such events: // Register for notification when the app shuts down [[NSNotificationCenter

Use of background/foreground methods in AppDelegate

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问题 I'm planning to implement multi-task in my app. I can see many methods here to do that in the AppDelegate like applicationWillResignActive , applicationDidEnterBackground , applicationWillEnterForeground , ... But.... I don't see the way they should be used, nor why they are not in the ViewControllers... Nor what they are here for. I mean : when the app enter in background, i don't know on which view my user is. And back, when the app comes into foreground, how would I know what to do and

Detecting the call events in ios

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I am new to ios. I was wondering if there is any way to detect the call events like incoming call, outgoing call even if my app is not in foreground. And if yes it is possible then can i read the details about that call like duration, whether it is missed, dialed or recieved. Thanks in advance. Yes you can detect a Call. but only if your app is running in the foreground. For this you can use the Core Telephony Framework . If your app will fall in any of the background running categories (VOIP, AUDIO, Location tracking or accessory ) you might be able to use the CTCallCenter in the background.

Detecting the call events in ios

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问题 I am new to ios. I was wondering if there is any way to detect the call events like incoming call, outgoing call even if my app is not in foreground. And if yes it is possible then can i read the details about that call like duration, whether it is missed, dialed or recieved. Thanks in advance. 回答1: Yes you can detect a Call. but only if your app is running in the foreground. For this you can use the Core Telephony Framework. If your app will fall in any of the background running categories