IOS实现聊天界面底部菜单栏效果

#import <UIKit/UIKit.h> @protocol ShowMoreOptionListener <NSObject> @optional -(void) onChangListener; @end @class ScrollView; /**  底部菜单视图  */ @interface BottomMenuView : UIView @property(nonatomic,strong) UIView* showPartView;    //总是可见部分 @property(nonatomic,strong) UIView* hiddenPartView;   //底部隐藏部分，需要点击显示部分才能显示出来 @property(nonatomic,weak) id<ShowMoreOptionListener> delegate; //下面更多操作菜单的的状态代理器 @property(nonatomic,strong) ScrollView* emojiPanel; -(void) buildOptionMenu; @end 

#import "BottomMenuView.h" #import "Masonry.h" #import "QuickWordsView.h" #import "ScrollView.h" #import "Constants.h" static const int QuickChat = 31; static const int Emoji = 32; static const int AddType = 33; static const int EmojiPanel = 34; static const int QuickChatPanel = 34; @implementation BottomMenuView -(instancetype) initWithFrame:(CGRect)frame{   if(self = [super initWithFrame:frame]){}   return self; } -(void) buildOptionMenu{   self.showPartView = [[UIView alloc] init];   //self.showPartView.backgroundColor = [UIColor greenColor];   [self addSubview:self.showPartView];   //添加showPartView约束   [self.showPartView mas_makeConstraints:^(MASConstraintMaker *make) {     make.right.equalTo(self).offset(0);     make.top.equalTo(self);     make.left.equalTo(self);     make.height.mas_equalTo(40);   }];   UIButton* showQuickWordsBtn = [[UIButton alloc] init];   [showQuickWordsBtn setImage:[UIImage imageNamed:@"ic_chat_input_method"] forState:UIControlStateNormal];   showQuickWordsBtn.imageView.contentMode = UIViewContentModeScaleAspectFit;   showQuickWordsBtn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;   showQuickWordsBtn.imageEdgeInsets = UIEdgeInsetsMake(0, -10, 0, 0);   showQuickWordsBtn.tag = QuickChat;   [showQuickWordsBtn addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];   [self.showPartView addSubview:showQuickWordsBtn];   [showQuickWordsBtn mas_makeConstraints:^(MASConstraintMaker *make) {     make.leading.equalTo(self.showPartView).offset(0);     make.top.equalTo(self.showPartView);     make.size.mas_equalTo(CGSizeMake(90, 40));   }];   //中间编辑框   UITextView* editText = [[UITextView alloc] init];   [self.showPartView addSubview:editText];   [editText mas_makeConstraints:^(MASConstraintMaker *make) {     make.leading.equalTo(showQuickWordsBtn.mas_trailing).offset(-10);     make.centerY.equalTo(showQuickWordsBtn.mas_centerY);     make.height.mas_equalTo(37);     make.trailing.equalTo(self.showPartView).offset(-100);   }];   //设置编辑框底部线   UIView* editTextbottomLine = [[UIView alloc] init];   editTextbottomLine.backgroundColor = [UIColor blackColor];   [self.showPartView addSubview:editTextbottomLine];   [editTextbottomLine mas_makeConstraints:^(MASConstraintMaker *make) {     make.leading.equalTo(showQuickWordsBtn.mas_trailing).offset(-10);     make.top.equalTo(showQuickWordsBtn.mas_bottom);     make.height.mas_equalTo(1.0);     make.trailing.equalTo(self.showPartView).offset(-100);   }];   //创建表情   UIButton* emojiBtn = [[UIButton alloc] init];   [emojiBtn setImage:[UIImage imageNamed:@"ic_emoji.png"] forState:UIControlStateNormal];   emojiBtn.imageView.contentMode = UIViewContentModeScaleAspectFit;   emojiBtn.tag = Emoji;   [emojiBtn addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];   [self addSubview:emojiBtn];   [emojiBtn mas_makeConstraints:^(MASConstraintMaker *make) {     make.leading.equalTo(editText.mas_trailing).offset(5);     make.centerY.equalTo(self.showPartView.mas_centerY);     make.size.mas_equalTo(CGSizeMake(38, 38));   }];   //创建+btn   UIButton* addBtn = [[UIButton alloc] init];   [addBtn setImage:[UIImage imageNamed:@"ic_gallery_add.png"] forState:UIControlStateNormal];   addBtn.imageView.contentMode = UIViewContentModeScaleAspectFit;   addBtn.tag = AddType;   [addBtn addTarget:self action:@selector(onClick:) forControlEvents:UIControlEventTouchUpInside];   [self addSubview:addBtn];   [addBtn mas_makeConstraints:^(MASConstraintMaker *make) {     make.right.equalTo(self.showPartView).offset(-10);     make.centerY.equalTo(self.showPartView.mas_centerY);     make.size.mas_equalTo(CGSizeMake(38, 38));   }];   //设置永久显示底部线   UIView* bottomLine = [[UIView alloc] init];   bottomLine.backgroundColor = [UIColor blackColor];   [self.showPartView addSubview:bottomLine];   [bottomLine mas_makeConstraints:^(MASConstraintMaker *make) {     make.leading.equalTo(showQuickWordsBtn);     make.top.equalTo(self.showPartView.mas_bottom).offset(5);     make.height.mas_equalTo(1.0);     make.trailing.equalTo(self.showPartView.mas_trailing);   }]; //  //下面开始处理隐藏部分，默认显示快捷消息 //  QuickWordsView* quickWordsView = [[QuickWordsView alloc] init]; //  quickWordsView.separatorInset = UIEdgeInsetsMake(0,10,0,10); //top left right down //  quickWordsView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero]; //删除底部多余行，及分割线 //  quickWordsView.tag = 100; //  [self addSubview:quickWordsView]; //  [quickWordsView mas_makeConstraints:^(MASConstraintMaker *make) { //    make.leading.equalTo(self); //    make.trailing.equalTo(self.mas_trailing); //    make.top.equalTo(self.mas_top).offset(47); //    make.height.mas_equalTo(210); //     //  }];   [self buildQuickChat]; } -(void)onClick:(UIButton*) button{   switch(button.tag){     case QuickChat:{       if(self.delegate){         [self.delegate onChangListener];       }     }break;     case Emoji:{     }break;     case AddType:{     }break;   } } -(void) buildQuickChat{   //下面开始处理隐藏部分，默认显示快捷消息   QuickWordsView* quickWordsView = [[QuickWordsView alloc] init];   quickWordsView.separatorInset = UIEdgeInsetsMake(0,10,0,10); //top left right down   quickWordsView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero]; //删除底部多余行，及分割线   quickWordsView.tag = QuickChatPanel;   [self addSubview:quickWordsView];   [quickWordsView mas_makeConstraints:^(MASConstraintMaker *make) {     make.leading.equalTo(self);     make.trailing.equalTo(self.mas_trailing);     make.top.equalTo(self.mas_top).offset(47);     make.height.mas_equalTo(210);   }]; } //-------------------kvo 实现观察主题 end---------------- @end 

-(void) testBottomMenu{    self.menu = [[BottomMenuView alloc] init];   self.menu.translatesAutoresizingMaskIntoConstraints = NO;   //self.menu.backgroundColor = [UIColor redColor];   [self.menu buildOptionMenu];   self.menu.delegate = self;   [self.view addSubview:self.menu];   //使用约束来达到效果，下面开始添加约束 靠着底部   NSLayoutConstraint* alginBottom = [NSLayoutConstraint constraintWithItem:self.menu                                   attribute:NSLayoutAttributeBottom                                   relatedBy:NSLayoutRelationEqual                                    toItem:self.view                                   attribute:NSLayoutAttributeBottom                                  multiplier:1                                   constant:0.0];   [self.view addConstraint:alginBottom];   //添加高度   self.bottomHeightCons = [NSLayoutConstraint                constraintWithItem:self.menu                attribute:NSLayoutAttributeHeight                relatedBy:NSLayoutRelationEqual                toItem:nil                attribute:0                multiplier:1                constant:260];   [self.menu addConstraint:self.bottomHeightCons];   //添加右边约束   NSLayoutConstraint* rightMargin = [NSLayoutConstraint constraintWithItem:self.menu                                   attribute:NSLayoutAttributeRight                                   relatedBy:NSLayoutRelationEqual                                    toItem:self.view                                   attribute:NSLayoutAttributeRight                                  multiplier:1                                   constant:0.0];   [self.view addConstraint:rightMargin];   //添加左边约束   NSLayoutConstraint* leftMargin = [NSLayoutConstraint constraintWithItem:self.menu                                   attribute:NSLayoutAttributeLeft                                   relatedBy:NSLayoutRelationEqual                                    toItem:self.view                                   attribute:NSLayoutAttributeLeft                                  multiplier:1                                   constant:0.0];   [self.view addConstraint:leftMargin]; } //更多操作按钮的协议监听接口 -(void)onChangListener{   //[self.view layoutIfNeeded];   if(self.bottomHeightCons.constant == 40){     self.bottomHeightCons.constant = 260;   }else{     self.bottomHeightCons.constant = 40;   }   [UIView animateWithDuration:0.5 animations:^{     [self.view layoutIfNeeded];   }];    }