详解iOS11、iPhone X、Xcode9 适配指南

// 其他版本的手机
key = _inProcessProvider      type = @"<UIStatusBarStateProvider>"
key = _showsForeground       type = B
key = _backgroundView        type = @"UIStatusBarBackgroundView"
key = _doubleHeightLabel      type = @"UILabel"
key = _doubleHeightLabelContainer  type = @"UIView"
key = _currentDoubleHeightText   type = @"NSString"
key = _currentRawData        type = {超长。。}
key = _interruptedAnimationCompositeViews type = @"NSMutableArray"
key = _newStyleBackgroundView    type = @"UIStatusBarBackgroundView"
key = _newStyleForegroundView    type = @"UIStatusBarForegroundView"
key = _slidingStatusBar       type = @"UIStatusBar"
key = _styleAttributes       type = @"UIStatusBarStyleAttributes"
key = _waitingOnCallbackAfterChangingStyleOverridesLocally type = B
key = _suppressGlow         type = B
key = _translucentBackgroundAlpha  type = d
key = _showOnlyCenterItems     type = B
key = _foregroundViewShouldIgnoreStatusBarDataDuringAnimation type = B
key = _tintColor          type = @"UIColor"
key = _lastUsedBackgroundColor   type = @"UIColor"
key = _nextTintTransition      type = @"UIStatusBarStyleAnimationParameters"
key = _overrideHeight        type = @"NSNumber"
key = _disableRasterizationReasons type = @"NSMutableSet"
key = _timeHidden          type = B
key = _statusBarWindow       type = @"UIStatusBarWindow"

// iPhone X
key = _statusBar ; type = @"_UIStatusBar"

// 因此可见iPhone X的状态栏是多嵌套了一层，多取一次即可，最终适配代码为：
NSArray *children;
// 不能用 [[self deviceVersion] isEqualToString:@"iPhone X"] 来判断，因为模拟器不会返回 iPhone X
  if ([[application valueForKeyPath:@"_statusBar"] isKindOfClass:NSClassFromString(@"UIStatusBar_Modern")]) {
    children = [[[[application valueForKeyPath:@"_statusBar"] valueForKeyPath:@"_statusBar"] valueForKeyPath:@"foregroundView"] subviews];
  } else {
    children = [[[application valueForKeyPath:@"_statusBar"] valueForKeyPath:@"foregroundView"] subviews];
  }