临时记几个网址

http://stackoverflow.com/questions/1317978/iphone-get-camera-preview

 

http://iphonedevelopertips.com/user-interface/screen-capture-using-uigetscreenimage.html

 

http://iphonedevelopertips.com/cocoa/how-to-mask-an-image.html

 

http://forums.macrumors.com/showthread.php?t=1159118

http://stackoverflow.com/questions/2081872/camera-overlay-view-just-for-preview/8898483#8898483

https://developer.apple.com/library/ios/navigation/

 

http://stackoverflow.com/questions/2081872/camera-overlay-view-just-for-preview

https://developer.apple.com/library/ios/#samplecode/PhotoScroller/Introduction/Intro.html