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实现的思路主要是：约束动画。
实现较简单，这里直接上代码：
。h文件：
#import@protocol ShowMoreOptionListener @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 delegate; //下面更多操作菜单的的状态代理器 @property(nonatomic,strong) ScrollView* emojiPanel; -(void) buildOptionMenu; @end
.m文件：
#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 测试代码：
-(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];
}];
} 总结
以上所述是小编给大家介绍的IOS实现聊天界面底部菜单栏效果，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对创新互联网站的支持！
