text: // The MIT License (MIT)
  //
  // Copyright (c) 2015-2016 forkingdog ( https://github.com/forkingdog )
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included in all
  // copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  
  #import <UIKit/UIKit.h>
  
  #if __IPHONE_OS_VERSION_MAX_ALLOWED < 90000
  #error "FDStackView must be compiled under iOS9 SDK at least"
  #endif
  
  #if __IPHONE_OS_VERSION_MIN_REQUIRED >= 90000
  #warning "No need for FDStackView with a deploy iOS version greater than 9.0"
  #endif
  
  // No need to use this class directly, it is the internal class that actually works before iOS9.
  @interface FDStackView : UIView
  
  - (instancetype)initWithArrangedSubviews:(NSArray<__kindof UIView *> *)views;
  
  @property (nonatomic, copy, readonly) NSArray<__kindof UIView *> *arrangedSubviews;
  
  - (void)addArrangedSubview:(UIView *)view;
  - (void)removeArrangedSubview:(UIView *)view;
  - (void)insertArrangedSubview:(UIView *)view atIndex:(NSUInteger)stackIndex;
  
  @property (nonatomic, assign) UILayoutConstraintAxis axis;
  @property (nonatomic, assign) UIStackViewDistribution distribution;
  @property (nonatomic, assign) UIStackViewAlignment alignment;
  @property (nonatomic, assign) CGFloat spacing;
  @property (nonatomic, assign, getter=isBaselineRelativeArrangement) BOOL baselineRelativeArrangement;
  @property (nonatomic, assign, getter=isLayoutMarginsRelativeArrangement) BOOL layoutMarginsRelativeArrangement;
  
  @end
  