开发学院手机开发 iPhone 开发 Apple关于iPad应用需要支持设备方向的要求阅读

Apple关于iPad应用需要支持设备方向的要求

　2010-12-19 07:19:18　来源：WEB开发网　闂傚倸鍊风欢姘缚瑜嶈灋闁圭虎鍠栫粻顖炴煥閻曞倹瀚�

闂傚倸鍊风粈渚€骞夐敓鐘插瀭闁汇垹鐏氬畷鏌ユ煙閹殿喖顣奸柛搴＄У閵囧嫰骞掗幋婵冨亾閻㈢ǹ纾婚柟鐐灱濡插牊绻涢崱妤冃℃繛宀婁簽缁辨捇宕掑鎵佹瀸闂佺懓鍤栭幏锟�

濠电姷鏁告慨顓㈠箯閸愵喖宸濇い鎾寸箘閹规洟姊绘笟鈧ḿ褍煤閵堝悿娲Ω閳轰胶鍔﹀銈嗗笂閼冲爼鍩婇弴銏＄厪闁搞儮鏅涙禒褏绱掓潏鈺佷槐闁轰焦鎹囬弫鎾绘晸閿燂拷闂傚倸鍊风欢姘缚瑜嶈灋闁圭虎鍠栫粻顖炴煥閻曞倹瀚�　　闂傚倸鍊烽懗鑸电仚缂備胶绮〃鍛村煝瀹ュ鍗抽柕蹇曞У閻庮剟姊虹紒妯哄闁诲繑姘ㄩ埀顒佸嚬閸撶喎顫忓ú顏勫瀭妞ゆ洖鎳庨崜浼存⒑闁偛鑻晶顔剧磼婢跺﹦绉虹€殿喖顭锋俊姝岊槷闁稿鎹囧Λ鍐ㄢ槈濞嗗繑娈橀梻浣风串缂嶁偓濞存粠鍓熼崺鈧い鎺戝€归弳顒勬煕鐎ｎ亷韬€规洑鍗冲鍊燁槾闁哄棴绠撻弻銊╂偆閸屾稑顏�

核心提示：Technical Q&A QA1689Supporting orientations for iPad appsQ: Which orientations should my iPad application support?A: It is strongly recommended that your applic

Technical Q&A QA1689

Supporting orientations for iPad apps

Q: Which orientations should my iPad application support?

A: It is strongly recommended that your application support all orientations. This includes portrait, portrait upside-down, landscape left and landscape right.

If it is essential that your application run in only one orientation (for instance, portrait only), then you should:

Launch in your supported orientation, regardless of the current device orientation.

Avoid displaying any UI element that tells people to rotate the device.

Support both variants of an orientation.

IMPORTANT: You should always make your application support both variants of an orientation. More specifically, if your application supports portrait, then it should support both UIInterfaceOrientationPortrait and UIInterfaceOrientationPortraitUpsideDown; if your application supports landscape, then it should support both UIInterfaceOrientationLandscapeLeft and UIInterfaceOrientationLandscapeRight.

When you are writing your application, consider using UIKit's interface orientation macros. In your UIViewController class, you should implement

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation to return:

UIInterfaceOrientationIsPortrait(interfaceOrientation) - if you support only portrait.

UIInterfaceOrientationIsLandscape(interfaceOrientation) - if you support only landscape.

Listing 1: Using an orientation macro in a portrait-only application

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation { return UIInterfaceOrientationIsPortrait(interfaceOrientation);}Note: If you are using UIDeviceOrientation, note that the iPad simulator does not support the constants UIDeviceOrientationFaceUp,UIDeviceOrientationFaceDown or UIDeviceOrientationUnknown.