IOS調用系統的相機默認是豎屏的，網上找了很多方法強制橫屏都無效，以下代碼經測試兼容ios78

自定義一個UIImagePickerController並且覆蓋以下方法：

 

-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {

return UIInterfaceOrientationLandscapeLeft;

}

 

- (NSUInteger)supportedInterfaceOrientations{

return UIInterfaceOrientationMaskLandscape;

}

 

- (BOOL)shouldAutorotate {

return YES;

}

 

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {

if(UIInterfaceOrientationIsLandscape(interfaceOrientation)) {

return YES;

} else {

return NO;

}

}

要兼容ios8還需要在delegate中加入以下代碼

 

-(NSUInteger)application:(UIApplication *)application supportedInterfaceOrientationsForWindow:(UIWindow *)window

{

 

NSString* strSubClass = [NSString stringWithUTF8String:object_getClassName(window.rootViewController.presentedViewController)];

if ([@"ImgTakeViewController" isEqualToString:strSubClass]) {

return UIInterfaceOrientationMaskAll;

}

return [application supportedInterfaceOrientationsForWindow:window];

}