iOS monitor app resumes from background to foreground

Source: Internet
Author: User

Under normal circumstances, the following two methods are implemented in the Appdelegate to enable monitoring to resume from the background to the foreground


[CPP]
-(void) Applicationdidenterbackground: (uiapplication *) application
{
Log4info (@ "---applicationdidenterbackground----");
Go backstage
}

-(void) Applicationdidbecomeactive: (uiapplication *) application
{

NSLog (@ "---applicationdidbecomeactive----");
Access to Reception


}

-(void) Applicationdidenterbackground: (uiapplication *) application
{
Log4info (@ "---applicationdidenterbackground----");
Go backstage
}

-(void) Applicationdidbecomeactive: (uiapplication *) application
{

NSLog (@ "---applicationdidbecomeactive----");
Access to Reception


}


But how does a single Uiviewcontroller listen?

In the-viewdidload method, add the Code listener notification


[CPP]
[[Nsnotificationcenter Defaultcenter] Addobserver:self
Selector: @selector (somemethod:)
Name:uiapplicationdidbecomeactivenotification Object:nil];

[[Nsnotificationcenter Defaultcenter] Addobserver:self
Selector: @selector (somemethod:)
Name:uiapplicationdidbecomeactivenotification Object:nil];
Don't forget to remove the listener from the-dealloc:


[CPP]
[[Nsnotificationcenter Defaultcenter] removeobserver:self];

[[Nsnotificationcenter Defaultcenter] removeobserver:self];

iOS monitor app resumes from background to foreground

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.