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 | @property(nonatomic,assign)BOOL isHiddenHomeIndicator;
 self.isHiddenHomeIndicator=YES;
 
 或者
 
 self.isHiddenHomeIndicator=NO;
 
 if (@available(iOS 11.0, *))
 {
 [self setNeedsUpdateOfHomeIndicatorAutoHidden];
 }
 
 - (BOOL)prefersHomeIndicatorAutoHidden
 {
 return self.isHiddenHomeIndicator;
 }
 
 
 |