??????????????

????4????Cocoa Touch????У???UIApplication??UIaccelerometer??NSUserDefaults??NSNotificationCenter???????????NSFileManager??NSBundle?????????Cocoa??????????????????Cocoa Touch???????á?(Cocoa????е????????NSFileManager??NSBundle??NSWorkspace??NSApplication??)??
????4.1??UIApplication
????UIApplication????????????ó??????п??????????????????UIApplication?????????????ó?????ж???UIApplicationDelegate?????????ó?????ж????????????楨??????????????к??????????????????????????????????????????????
????4.1.1 + sharedApplication??????????????UIApplication??????????
????4.1.2 idleTimerDisabled??????趨????“?????????”????????????NO?????????????????????????
????4.1.3 - openURL:????????????Щ?????iOS???????а???????????????????????綽?????????????E-mail??
1//???????
2NSURL*url=[NSURLURLWithString:@"http://www.baidu.com"];
3[[UIApplicationsharedApplication]openURL:url];
4
5//??Google??????????????????????????????
6NSString*searchQuery=@"?й???????????";
7//???????????URL????
8searchQuery=[searchQuerystringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
9NSString*urlString=[NSStringstringWithFormat:@"http://maps.google.com/maps?q=%@"??searchQuery];
10[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:urlString]];
11
12//????綽
13[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"tel://123456"]];
14
15//???????
16[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"sms:123456"]];
17
18//????E-mail??????????
19[[UIApplicationsharedApplication]openURL:[NSURLURLWithString:@"mailto://xxxx@xxx.com"]];
????4.2 UIAccelerometer
??????????????????????????豸????????豸??x??y???z?????????????????+sharedAccelerometer?????????????UIAccelerometer?????????????
??????Application????????????ж??????ж???????ж?????UIAccelerometerDelegate??UIAccelerometer????????????ж??????????ж??????????????????
????4.3 NSUserDefaults
??????????NSUserDefaults???????????????????????
????+ standardUserDefaults?????????????NSUserDefaults?????????????
????4.4 NSNotificationCenter
??????????NSNotificationCenter????????????????ù???????????????
????+ defaultCenter?????????????NSNotificationCenter?????????????
????4.5 NSFileManager
????NSFileManager????????????????ò??????????λ?????????????????????С???iOS5??Mac OS X v10.7??????????????洢??iCloud????????
????+ defaultManager?????????????NSFileManager??????????????÷?????????NSFileManager????????????????????- init????????????н????+ defaultManager????????????????NSFileManager???????????????У?NSFileManagerDelegate????????????????????????????????- init????????????μ??????????????ù???????
????4.5NSBundle
????NSBundle?????????????ж???????д?????λ??????????????????????????????????
????+ mainBundle?????????????NSBundle?????????????