OC
成員變量貼出來田度！
@property (nonatomic, strong) UITableView *myTableView;
@property (nonatomic, strong) UITextField *myTextField;
@property (nonatomic, strong) UIButton *myButton;
@property (nonatomic, strong) NSMutableArray *modelArr;
@property (nonatomic, strong) NSString *textContent;
初始化控件象颖、一些基本常用的屬性布疙、記得添加鍵盤的通知熔吗！
// 初始化控件
- (void)creatCustomView{
_myButton = [UIButton buttonWithType:UIButtonTypeCustom];
_myButton.frame = CGRectMake(SCREEN_WIDTH - 40, SCREEN_HEIGHT - 30, 40, 30);
_myButton.backgroundColor = [UIColor greenColor];
[_myButton setTitle:@"發(fā)送" forState:UIControlStateNormal];
_myButton.titleLabel.font = [UIFont systemFontOfSize:12];
[_myButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[_myButton addTarget:self action:@selector(myButtonClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_myButton];
_myTextField = [[UITextField alloc] initWithFrame:CGRectMake(0, SCREEN_HEIGHT - 30, SCREEN_WIDTH - 40, 30)];
_myTextField.backgroundColor = [UIColor orangeColor];
_myTextField.textColor = [UIColor blackColor];
_myTextField.delegate = self;
_myTextField.clearButtonMode = UITextFieldViewModeWhileEditing;//右邊清除按鈕模式
_myTextField.returnKeyType = UIReturnKeySend;//return鍵格式
_myTextField.placeholder = @"發(fā)表你的看法";
_myTextField.clearsOnBeginEditing = YES;//開始編輯時(shí) 清空
// _myTextField.layer.cornerRadius = 15;
// _myTextField.layer.masksToBounds = YES;// 控制圓角
_myTextField.font = [UIFont systemFontOfSize:12];
_myTextField.textAlignment = NSTextAlignmentLeft;
[self.view addSubview:_myTextField];
//監(jiān)控鍵盤狀態(tài)
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
}
通過監(jiān)聽鍵盤狀態(tài)做相應(yīng)的處理辆床、獲取鍵盤彈出動(dòng)畫的時(shí)間來做自定義動(dòng)畫時(shí)間是為了保持控件和鍵盤動(dòng)畫同步！
// 鍵盤彈出
- (void)keyboardWillShow:(NSNotification *)notification{
//獲取鍵盤高度
CGFloat kbHeight = [[notification.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
//計(jì)算偏移量
CGFloat offY = SCREEN_HEIGHT - 30 - kbHeight;
//獲取動(dòng)畫時(shí)間
double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
[UIView animateWithDuration:duration animations:^{
// 更改控件frame
_myTextField.frame = CGRectMake(0, offY, SCREEN_WIDTH - 40, 30);
_myButton.frame = CGRectMake(SCREEN_WIDTH - 40, offY, 40, 30);
_myTableView.frame = CGRectMake(0, 0, SCREEN_WIDTH, offY);
// 設(shè)置tableview cell滑動(dòng)最后一行
[_myTableView setContentOffset:CGPointMake(0, _myTableView.contentSize.height - _myTableView.bounds.size.height) animated:NO];
}];
}
// 鍵盤收回
- (void)keyboardWillHide:(NSNotification *)notification{
//獲取動(dòng)畫時(shí)間
double duration = [[notification.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] doubleValue];
[UIView animateWithDuration:duration animations:^{
// 恢復(fù)frame
_myTextField.frame = CGRectMake(0, SCREEN_HEIGHT - 30, SCREEN_WIDTH - 40, 30);
_myButton.frame = CGRectMake(SCREEN_WIDTH - 40, SCREEN_HEIGHT - 30, 40, 30);
_myTableView.frame = CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT - 30);
}];
}
點(diǎn)擊發(fā)送桅狠、事件處理讼载！
- (void)myButtonClick{
_textContent = _myTextField.text;
if (![_textContent isEqual: @""]) {
[_modelArr addObject:_textContent];
[_myTableView reloadData];
_myTextField.text = @"";//完成textfield 清空
}else {
[SVProgressHUD showInfoWithStatus:@"輸入不能為空"];
}
// 設(shè)置tableview cell滑動(dòng)最后一行
[_myTableView setContentOffset:CGPointMake(0, _myTableView.contentSize.height - _myTableView.bounds.size.height) animated:NO];
}
點(diǎn)擊鍵盤的return鍵、發(fā)送跟button處理事件一樣中跌、實(shí)現(xiàn)textfield的代理方法咨堤、記得收回鍵盤、這里取消textfield的第一響應(yīng)漩符！
- (BOOL)textFieldShouldReturn:(UITextField *)textField{
[_myTextField resignFirstResponder];
[self myButtonClick];
return YES;
}
數(shù)據(jù)源一喘！
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ID"];
// 自動(dòng)換行
cell.textLabel.numberOfLines = 0;
// 顯示類型
cell.textLabel.lineBreakMode = NSLineBreakByCharWrapping;
if (_modelArr.count != 0) {
cell.textLabel.text = [_modelArr objectAtIndex:indexPath.row];
}
return cell;
}
動(dòng)態(tài)計(jì)算文本高度！
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
NSString * textArray = [_modelArr objectAtIndex:indexPath.row];
// 計(jì)算文本尺寸
CGSize textSize1 = [textArray boundingRectWithSize:tableView.bounds.size options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingTruncatesLastVisibleLine attributes:@{NSFontAttributeName: [UIFont systemFontOfSize:12.0]} context:nil].size;
return textSize1.height + 35;
}
添加個(gè)手勢(shì)嗜暴、只添加點(diǎn)擊測(cè)試凸克！
//添加手勢(shì)
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideTextField)];
[self.view addGestureRecognizer:tap];
// 觸摸其他區(qū)域 收回鍵盤
- (void)hideTextField{
[_myTextField resignFirstResponder];
}
最后記得清除通知议蟆！
- (void)dealloc{
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
Swift一樣實(shí)現(xiàn)、只是寫法不同萎战！
var myTableView: UITableView!
var myTextField: UITextField!
var myView: UIView!
var myButton: UIButton!
var modelArr = [String]()
var contentText = ""
初始化控件咐容、這個(gè)我把控件放在一個(gè)自定義View上、省幾行代碼撞鹉！
func creatCustomView() {
myView = UIView.init(frame: CGRect.init(x: 0, y: SCREEN_HEIGHT - 49, width: SCREEN_WIDTH, height: 49))
myView.backgroundColor = .orange
self.view.addSubview(myView)
myButton = UIButton.init(type: .custom)
myButton.frame = CGRect.init(x: SCREEN_WIDTH - 50, y: 0, width: 50, height: 49)
myButton.setTitle("發(fā)送", for: .normal)
myButton.backgroundColor = .green
myButton.addTarget(self, action: #selector(myButtonSend), for: .touchUpInside)
myView.addSubview(myButton)
myTextField = UITextField.init(frame: CGRect.init(x: 0, y: 0, width: SCREEN_WIDTH - 50, height: 49))
myTextField.backgroundColor = .red
myTextField.textColor = .black
myTextField.delegate = self
myTextField.clearButtonMode = .whileEditing
myTextField.returnKeyType = .send
myTextField.placeholder = "發(fā)表你的看法"
myTextField.clearsOnBeginEditing = true
myTextField.font = UIFont.systemFont(ofSize: 12)
myTextField.textAlignment = .left
myView.addSubview(myTextField)
/// 監(jiān)控鍵盤狀態(tài)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillShow(notification:)), name: .UIKeyboardWillShow, object: nil)
NotificationCenter.default.addObserver(self, selector: #selector(keyboardWillHide(notification:)), name: .UIKeyboardWillHide, object: nil)
}
實(shí)現(xiàn)通知方法疟丙！
/// 鍵盤呼出
func keyboardWillShow(notification: NSNotification) {
/// 獲取鍵盤偏移量
let kbHeight = (notification.userInfo?[UIKeyboardFrameEndUserInfoKey] as? NSValue)?.cgRectValue.size.height
/// 計(jì)算偏移量
let offY = SCREEN_HEIGHT - 49 - kbHeight!
/// 獲取動(dòng)畫時(shí)間(鍵盤彈出 textfield和鍵盤動(dòng)畫同步)
let duration = notification.userInfo?[UIKeyboardAnimationDurationUserInfoKey] as? TimeInterval
UIView.animate(withDuration: duration!, animations: {() -> Void in
self.myView.frame = CGRect.init(x: 0, y: offY, width: SCREEN_WIDTH, height: 49)
self.myTableView.frame = CGRect.init(x: 0, y: 0, width: SCREEN_WIDTH, height: offY)
self.myTableView.setContentOffset(CGPoint.init(x: 0, y: self.myTableView.contentSize.height - self.myTableView.bounds.size.height), animated: false)
})
}
/// 鍵盤隱藏
func keyboardWillHide(notification: Notification) {
let duration = notification.userInfo?[UIKeyboardAnimationDurationUserInfoKey] as? TimeInterval
UIView.animate(withDuration: duration!, animations: {() -> Void in
self.myView.frame = CGRect.init(x: 0, y: SCREEN_HEIGHT - 49, width: SCREEN_WIDTH, height: 49)
self.myTableView.frame = CGRect.init(x: 0, y: 0, width: SCREEN_WIDTH, height: SCREEN_HEIGHT - 49)
})
}
自定義發(fā)送按鈕！
func myButtonSend() {
contentText = myTextField.text!
print("\(contentText)")
if !contentText.isEmpty {
modelArr.append(contentText)
myTableView.reloadData()
myTextField.text = ""
}else {
print("輸入為空")
}
self.myTableView.setContentOffset(CGPoint.init(x: 0, y: self.myTableView.contentSize.height - self.myTableView.bounds.size.height), animated: false)
}
textfield代理方法鸟雏、點(diǎn)擊發(fā)送收回鍵盤享郊！
func textFieldShouldReturn(_ textField: UITextField) -> Bool {
textField.resignFirstResponder()
myButtonSend()
return true
}
數(shù)據(jù)源！
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let myCell = tableView.dequeueReusableCell(withIdentifier: "ID")
if modelArr.count != 0 {
myCell?.textLabel?.text = modelArr[indexPath.row]
}
/// 自動(dòng)換行
myCell?.textLabel?.numberOfLines = 0
/// 顯示類型
myCell?.textLabel?.lineBreakMode = .byCharWrapping
return myCell!
}
動(dòng)態(tài)計(jì)算文本高度孝鹊！這里有一點(diǎn)說明一下炊琉、計(jì)算文本的方法提示打不出來、只有自己硬打出來又活！方法返回的類型是CGRect苔咪、可以自己看一下！
func tableView(_ tableView: UITableView, heightForRowAt indexPath: IndexPath) -> CGFloat {
let textArray = modelArr[indexPath.row] as String
/// 計(jì)算文本尺寸
let textSize = textArray.boundingRect(with: myTableView.bounds.size, options: [.usesLineFragmentOrigin, .truncatesLastVisibleLine], attributes: [NSFontAttributeName:UIFont.systemFont(ofSize: 12)], context: nil)
return textSize.size.height + 35
}
手勢(shì)柳骄！
/// 添加觸摸手勢(shì)
let tap = UITapGestureRecognizer.init(target: self, action: #selector(tapTouch))
self.view.addGestureRecognizer(tap)
/// 觸摸其他區(qū)域 隱藏鍵盤
func tapTouch() {
myTextField.resignFirstResponder()
}
移除通知
deinit {
NotificationCenter.default.removeObserver(self)
}
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