问题
I am using this plugin https://github.com/apache/cordova-plugin-screen-orientation for orientation and I'm doing this in config.xml file <preference name="orientation" value="portrait" />. This prevents it flipping to landscape mode, but can still file 180 degrees on my iPhone. How can I prevent this?
回答1:
You can disable this by unchecking the upside down orientation in Xcode.
回答2:
the orientation preferences are not for the cordova-plugin-orientation, those are regular cordova preferences as as you say, portrait allows both portrait options, regular portrait and upside down.
For only allowing regular portrait you have to use portrait-primary, but not as a preference.
As you are using the cordova-plugin-orientation, you have to use it's api to lock the screen rotation, so use this after device ready fires
window.screen.orientation.lock('portrait-primary');
来源：https://stackoverflow.com/questions/44491204/prevent-180-degree-flip-ios-cordova