iOS foreground and background interaction problems

Make a login screen on iOS. . I do not know how to describe their problems Eph. . Similar qq login screen that I put the user to enter a user name and password, pass the background, so that the background to judge a user name and password are correct or not, and then returns a value to me and tell me the username and password are correct, the user name and password are correct successful landing, otherwise login failed. . . . The problem now is that I do not know how to pass the username and password back? ? Do not know how to pass something back to me? ? Can you give me on this aspect Detailed look? Or give me some keywords? Or connect? Thank you pull. . What is the reception? What is the background? My understanding is that the reception is the iphone interface, users see. . The background is some technical support, data support. . .
Reply:
You tune into this font color, is designed to prevent someone else see it? I will give you keywords ASIHTTPRequest
Reply:

cited a floor niepeng109 reply:

you tune into this font color, is specifically not allowing people to see it? I sent you a keyword ASIHTTPRequest

The color of Eritrea. . Is not. . That. . / Hey. . Do not explain. . . Can not have more than ASIHTTPRequest this basis it? ASIHTTPRequest seems to be a very powerful third-party frameworks. . . iOS send http request (get method, post method). . Ah, let me fiddle fiddle to
Reply:
Io provide interfaces directly with it, the beginning of the study, they can learn more about the next. In fact, it is very simple.
Reply:
code4app.com
Many examples above, you can go to download it look.
xcode own example UICatalog can look.
Reply:

reference to the third floor pearlhuzhu reply:

directly interfaces io provide it, the beginning of the study, they can learn more about the next. In fact, it is very simple.

Everyone says is very simple. . But for those who do not, for the people who do not understand. . . Sincerely want to say, so hard Yeah. .
Reply:

references, 4th Floor hslinux reply:

code4app.com
Many examples above, you can go to download it look.
xcode own example UICatalog can look.

Lie down on xcode 4app. . It feels too many features to achieve it. . Many custom. . . For beginners looking for me a headache. . I am now looking at base. . Understand the basic process of accessing the network. . Then look at how to get slightly
Reply:

The reply was deleted administrator at 2013-10-14 14:33:53

Reply:

The reply was deleted administrator at 2013-10-14 14:33:53

Reply:
http://blog.csdn.net/willingyatou/article/details/12617073 solution to this problem