最近用到了表情键盘就去网上找了下，感觉网上的都是为了更大的需求写的，而我并不需要所以就自己写了个简单的实现。
1.用到的表情字符串是从Emojiplist文件里获取到的;
2.需要添加一个观察者：
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[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil]; - (void)keyboardWillShow:(NSNotification *)notification{ // 键盘显示\隐藏完毕的frame CGRect frame = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue]; // 动画时间 CGFloat duration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue]; // 动画 [UIView animateWithDuration:duration animations:^{ commentView.minY = -frame.size.height; }];} |
3.创建控件:
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//声明的全局变量： UIButton *commentView; UIView *commentWhiteColorView; UITextField *commentTextField; UIButton *emojiAndKeyboardButton; - (void)initCommentToolbarView{ commentView = [[UIButton alloc]initWithFrame:CGRectMake(0, 0, kScreenWidth, kScreenHeight + 230)]; commentView.hidden = YES; [commentView addTarget:self action:@selector(commentViewAction) forControlEvents:UIControlEventTouchUpInside]; [self.view addSubview:commentView]; commentWhiteColorView = [UIView viewWithFrame:CGRectMake(0, kScreenHeight - 50, kScreenWidth, 50) backgroundColor:[UIColor whiteColor]]; commentWhiteColorView.backgroundColor = [UIColor whiteColor]; [commentView addSubview:commentWhiteColorView]; UIView *lightGrayLineView = [UIView viewWithFrame:CGRectMake(0, 0, kScreenWidth, 1) backgroundColor:RGB(240, 240, 240)]; [commentWhiteColorView addSubview:lightGrayLineView]; //文本输入框 commentTextField = [[UITextField alloc]initWithFrame:CGRectMake(10, 5, kScreenWidth - (10 + 42 + 60), 40)]; commentTextField.font = FONT(14); commentTextField.leftView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, 10, 40)]; commentTextField.leftViewMode = UITextFieldViewModeAlways; commentTextField.backgroundColor = RGB(234, 234, 234); commentTextField.placeholder = @"评论"; [commentWhiteColorView addSubview:commentTextField]; //表情和键盘切换按钮 emojiAndKeyboardButton = [UIButton buttonWithType:UIButtonTypeCustom]; emojiAndKeyboardButton.frame = CGRectMake(commentTextField.maxX + 7, 0, 35, 50); [emojiAndKeyboardButton setImage:[UIImage imageNamed:@"icon_emoji_input"] forState:UIControlStateNormal]; [emojiAndKeyboardButton setImage:[UIImage imageNamed:@"icon_keyboard_input"] forState:UIControlStateSelected]; [emojiAndKeyboardButton addTarget:self action:@selector(emojiAndKeyboardButtonAction:) forControlEvents:UIControlEventTouchUpInside]; [commentWhiteColorView addSubview:emojiAndKeyboardButton]; //发送按钮 UIButton *sendButton = [UIButton buttonWithFrame:CGRectMake(emojiAndKeyboardButton.maxX, commentTextField.minY, 50, 40) type:UIButtonTypeCustom title:@"发送" titleColor:RGB(135, 135, 135) imageName:nil action:@selector(sendButtonAction) target:self]; sendButton.titleLabel.font = FONT(14); [sendButton setBorder:1 color:RGB(135, 135, 135)]; [sendButton setCornerRadius:3]; [commentWhiteColorView addSubview:sendButton]; //表情滚动视图 emojiScrollView = [[UIScrollView alloc]initWithFrame:CGRectMake(0, commentWhiteColorView.maxY, kScreenWidth, 200)]; emojiScrollView.backgroundColor = RGB(244, 244, 246); emojiScrollView.delegate = self; emojiScrollView.pagingEnabled = YES; [commentView addSubview:emojiScrollView]; //从文件里获取到的表情字符串数组 emojiArray = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle]pathForResource:@"Emoji" ofType:@"plist"]]; CGFloat emojiButtonWidth = kScreenWidth/8; int i = 0; //页数向上取整 int page = ceilf(emojiArray.count/32.0); //UIKit里的页面控制器 pageControl = [[UIPageControl alloc] initWithFrame:CGRectMake(0, emojiScrollView.maxY, kScreenWidth, 30)]; pageControl.numberOfPages = page; pageControl.backgroundColor = RGB(244, 244, 246); pageControl.pageIndicatorTintColor = RGB(206, 206, 206); pageControl.currentPageIndicatorTintColor = RGB(121, 121, 121); [commentView addSubview:pageControl]; //设置表情滚动视图的contentSize emojiScrollView.contentSize = CGSizeMake(kScreenWidth * page, 200); //循环创建表情按钮 for (int currentPage = 0; currentPage < page; currentPage++) { for (int row = 0; row < 4; row++) { for (int column = 0; column < 8; column++) { UIButton *emojiButton = [UIButton buttonWithType:UIButtonTypeCustom]; if (row == 3 && column == 7) { //如果是第4行第8列就设置删除表情的图片替代字符串，并调用另一个方法 [emojiButton setImage:[UIImage imageNamed:@"back_icon_input"] forState:UIControlStateNormal]; [emojiButton addTarget:self action:@selector(deleteEmojiAction) forControlEvents:UIControlEventTouchUpInside]; }else{ [emojiButton setTitle:emojiArray[i++] forState:UIControlStateNormal]; [emojiButton addTarget:self action:@selector(emojiButtonAction:) forControlEvents:UIControlEventTouchUpInside]; } emojiButton.frame = CGRectMake(emojiButtonWidth * column + currentPage * kScreenWidth, 50 * row, emojiButtonWidth, 50); [emojiScrollView addSubview:emojiButton]; //当i等于数组计数时就打断循环 if (i == emojiArray.count) { break; } } } } //手动添加最后一个删除表情按钮 UIButton *emojiButton = [UIButton buttonWithType:UIButtonTypeCustom]; [emojiButton setImage:[UIImage imageNamed:@"back_icon_input"] forState:UIControlStateNormal]; emojiButton.frame = CGRectMake(emojiButtonWidth * 7 + 5 * kScreenWidth, 50 * 3, emojiButtonWidth, 50); [emojiButton addTarget:self action:@selector(deleteEmojiAction) forControlEvents:UIControlEventTouchUpInside]; [emojiScrollView addSubview:emojiButton];} //表情按钮事件- (void)emojiButtonAction:(UIButton *)sender{// NSLog(@"%@",sender.currentTitle); NSMutableString *oldText = [NSMutableString stringWithString:commentTextField.text]; [oldText appendString:sender.currentTitle]; commentTextField.text = oldText;} //删除表情按钮事件- (void)deleteEmojiAction{ if (commentTextField.text.length > 1) { //判断是否是表情，表情length为2，所以减去2 if ([emojiArray containsObject:[commentTextField.text substringWithRange:NSMakeRange(commentTextField.text.length - 2, 2)]]) { commentTextField.text = [commentTextField.text substringToIndex:commentTextField.text.length - 2]; }else{ commentTextField.text = [commentTextField.text substringToIndex:commentTextField.text.length - 1]; } }else{ commentTextField.text = @""; }} //在代理方法中调整pageControl- (void)scrollViewDidEndDecelerating:(UIScrollView *)scrollView{ if (scrollView == emojiScrollView) { pageControl.currentPage = scrollView.contentOffset.x/scrollView.width; }} //表情和键盘切换按钮事件- (void)emojiAndKeyboardButtonAction:(UIButton *)sender{ sender.selected = !sender.selected; if (sender.selected == YES) { [commentTextField resignFirstResponder]; [UIView animateWithDuration:0.5 animations:^{ commentView.minY = -230; }]; }else{ [commentTextField becomeFirstResponder]; }} - (void)commentViewAction{ [commentTextField resignFirstResponder]; commentView.hidden = YES; commentView.minY = 0; commentTextField.text = @""; emojiAndKeyboardButton.selected = NO;} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
