在UISplitviewCOntroller中将JSQMessagesViewController用作detailView时，KeyBoardToolBar只需要出现在DetailViewController中

Question

在UISplitViewController中将JSQMessagesViewController用作detailView时，KeyBoardToolBar仅需要出现在DetailViewController中

Answer 1

迟来的答案...

如果要减少inputToolbar ，则需要创建JSQMessagesToolbarContentView的子类，并为工具栏的内容视图提供自己的视图。

在下面的示例中，创建一个JSQMessagesToolbarContentView的JSQMessagesToolbarContentView命名为JSQMessagesToolbarContentView_custom ，在下面的代码中添加以下代码，

#import "JSQMessagesToolbarContentView.h"

@interface JSQMessagesToolbarContentView_custom : JSQMessagesToolbarContentView
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *holderViewLeadingConstraint;
@end

在JSQMessagesToolbarContentView_custom.m文件中，

#import "UIView+JSQMessages.h"
#import "JSQMessagesToolbarContentView_custom.h"

@implementation JSQMessagesToolbarContentView_custom

+ (UINib *)nib
{
      return [UINib nibWithNibName:NSStringFromClass([JSQMessagesToolbarContentView_custom class])
                      bundle:[NSBundle bundleForClass:[JSQMessagesToolbarContentView_custom class]]];
}

#pragma mark - Initialization

- (void)awakeFromNib
{
   [super awakeFromNib];
   [self setTranslatesAutoresizingMaskIntoConstraints:NO];
   self.backgroundColor = [UIColor clearColor];
}

//below method will place the contentview to desired position 
- (void)layoutSubviews
{
   [super layoutSubviews];
   self.holderViewLeadingConstraint.constant = 320;
}

#pragma mark - Setters

- (void)setBackgroundColor:(UIColor *)backgroundColor
{
   [super setBackgroundColor:backgroundColor];
   self.leftBarButtonContainerView.backgroundColor = backgroundColor;
   self.rightBarButtonContainerView.backgroundColor = backgroundColor;
}

- (void)setLeftBarButtonItem:(UIButton *)leftBarButtonItem
{
   [super setLeftBarButtonItem:leftBarButtonItem];  
}

- (void)setLeftBarButtonItemWidth:(CGFloat)leftBarButtonItemWidth
{  
   // self.leftBarButtonContainerViewWidthConstraint.constant = leftBarButtonItemWidth;
   [self setNeedsUpdateConstraints];
}

- (void)setRightBarButtonItem:(UIButton *)rightBarButtonItem
{
   [super setRightBarButtonItem:rightBarButtonItem]; 
}

- (void)setRightBarButtonItemWidth:(CGFloat)rightBarButtonItemWidth
{  
   //  self.rightBarButtonContainerViewWidthConstraint.constant = rightBarButtonItemWidth;
   [self setNeedsUpdateConstraints];
}

- (void)setRightContentPadding:(CGFloat)rightContentPadding
{
   // self.rightHorizontalSpacingConstraint.constant = rightContentPadding;
  [self setNeedsUpdateConstraints];
}

- (void)setLeftContentPadding:(CGFloat)leftContentPadding
{
   //  self.leftHorizontalSpacingConstraint.constant = leftContentPadding;
   [self setNeedsUpdateConstraints];
}

#pragma mark - UIView overrides

- (void)setNeedsDisplay
{
    [super setNeedsDisplay];
    [self.textView setNeedsDisplay];
}


//return the custom view that we are going to create next 
- (JSQMessagesToolbarContentView_custom *)loadToolbarContentView
{
   NSArray *nibViews = [[NSBundle bundleForClass:[JSQMessagesToolbarContentView_custom class]] loadNibNamed:NSStringFromClass([JSQMessagesToolbarContentView_custom class])  owner:nil  options:nil];
  return nibViews.firstObject;
}

在此之后，你需要创建新添加.xib文件命名为JSQMessagesToolbarContentView_custom.xib该文件包含我们的小内容视图的inputToolbar更重要的是设置了让连接为做演示的例子和ASLO设置视图类名JSQMessagesToolbarContentView_custom 。 听说我只能添加自定义视图的图像。

现在为领先的约束创建出口，以减小内容视图的大小，如下所示，

并按照演示中的说明添加约束出口。 因此，如果您在不修改基类的情况下添加了一些constrian，它将给出错误或运行时错误，因此也请编辑基类

现在转到JSQMessagesToolbarContentView.h并添加剪切属性表单JSQMessagesToolbarContentView.m ，将其剪切过去并使其公开。

@interface JSQMessagesToolbarContentView : UIView

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *leftBarButtonContainerViewWidthConstraint;


@property (weak, nonatomic) IBOutlet NSLayoutConstraint *rightBarButtonContainerViewWidthConstraint;

@property (weak, nonatomic) IBOutlet NSLayoutConstraint *leftHorizontalSpacingConstraint;
@property (weak, nonatomic) IBOutlet NSLayoutConstraint *rightHorizontalSpacingConstraint;

//...rest of the code 

现在在JSQMessagesInputToolbar.m文件中，为了使工具栏在splitview的一半范围内变得透明，

- (void)awakeFromNib
{
    [super awakeFromNib];
     //...rest of the code
    [self setBackgroundImage:[UIImage new]//imageNamed:@"topbar"]
              forToolbarPosition:UIToolbarPositionAny
                      barMetrics:UIBarMetricsDefault];
    [self setShadowImage:[UIImage new] forToolbarPosition:UIBarPositionAny];
    [self setBackgroundColor:[UIColor clearColor]];

}

多数民众赞成现在它运行该项目，并更改输出下面看到的领先约束常量，