// 有些界面以下使用代理方法來(lái)設(shè)置，發(fā)現(xiàn)并沒(méi)有生效
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section;
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section;

// 這樣的原理是因?yàn)橹爸皇菍?shí)現(xiàn)了高度的代理方法，卻沒(méi)有實(shí)現(xiàn)View的代理方法，iOS10及以前這么寫是沒(méi)問(wèn)題的，iOS11開(kāi)啟了行高估算機(jī)制引起的bug，因此有以下幾種解決方法：

// 解決方法一：添加實(shí)現(xiàn)View的代理方法
- (UIView *)tableView:(UITableView *)tableView viewForFooterInSection:(NSInteger)section {
  return nil;
}
- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section {
  return nil;
}

// 解決方法二：直接使用tableView屬性進(jìn)行設(shè)置,修復(fù)該UI錯(cuò)亂
self.tableView.sectionHeaderHeight = 0;
self.tableView.sectionFooterHeight = 5;

[_optionTableView setContentInset:UIEdgeInsetsMake(-35, 0, 0, 0)];

// 解決方法三：添加以下代碼關(guān)閉估算行高
self.tableView.estimatedRowHeight = 0;
self.tableView.estimatedSectionHeaderHeight = 0;
self.tableView.estimatedSectionFooterHeight = 0;

// A view controller that will be shown inside of a navigation controller can assign a UISearchController to this property to display the search controller's search bar in its containing navigation controller's navigation bar.
@property (nonatomic, retain, nullable) UISearchController *searchController API_AVAILABLE(ios(11.0)) API_UNAVAILABLE(tvos);

// If this property is true (the default), the searchController's search bar will hide as the user scrolls in the top view controller's scroll view. If false, the search bar will remain visible and pinned underneath the navigation bar.

// 測(cè)試代碼
#import <objc/runtime.h>
NSMutableString *resultStr = [NSMutableString string];
//獲取指定類的Ivar列表及Ivar個(gè)數(shù)
unsigned int count = 0;
Ivar *member = class_copyIvarList([[application valueForKeyPath:@"_statusBar"] class], &count);
  
for(int i = 0; i < count; i++){
  Ivar var = member[i];
  //獲取Ivar的名稱
  const char *memberAddress = ivar_getName(var);
  //獲取Ivar的類型
  const char *memberType = ivar_getTypeEncoding(var);
  NSString *str = [NSString stringWithFormat:@"key = %s       type = %s \n",memberAddress,memberType];
   [resultStr appendString:str];
}
NSLog(@"%@", resultStr);

// 其他版本的手機(jī)
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 = {超長(zhǎng)。。}
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"

// 因此可見(jiàn)iPhone X的狀態(tài)欄是多嵌套了一層，多取一次即可，最終適配代碼為：
NSArray *children;
// 不能用 [[self deviceVersion] isEqualToString:@"iPhone X"] 來(lái)判斷，因?yàn)槟M器不會(huì)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];
  }