剛好做到這個(gè)功能，記錄一下自己走的坑.

方法一：

文章一
思路大概：

在UITextField或者UITextView里，有個(gè)'inputAccessoryView'屬性

在這個(gè)屬性上添加一個(gè)view，View里面有個(gè)UITextView或UITextField。

點(diǎn)擊btn的時(shí)候，讓View里面的UITextField或者UITextView成為第一響應(yīng)者

這樣就可以彈出鍵盤

方法二：

文章二

通過(guò)監(jiān)聽(tīng)鍵盤彈出的通知進(jìn)行相應(yīng)的處理.

UIView *keyBoardTopView = [[UIView alloc] initWithFrame:CGRectMake(0, XJWScreenH, XJWScreenW, 50)];
keyBoardTopView.backgroundColor = [UIColor whiteColor];
keyBoardTopView.layer.borderWidth = 0.7;
keyBoardTopView.layer.borderColor = [UIColor orangeColor].CGColor;
self.sendBtn = [[UIButton alloc] initWithFrame:CGRectMake(keyBoardTopView.bounds.size.width-60-12, 4, 60, 45)];
self.sendBtn.titleLabel.font = [UIFont boldSystemFontOfSize:17];
[self.sendBtn setTitle:@"發(fā)布" forState:UIControlStateNormal];
self.sendBtn.alpha = 0.4;
self.sendBtn.tag = 2002;
[self.sendBtn setTitleColor:[UIColor grayColor] forState:UIControlStateNormal];
[self.sendBtn addTarget:self action:@selector(dismissKeyboard:) forControlEvents:UIControlEventTouchUpInside];
[keyBoardTopView addSubview:self.sendBtn];

UITextField *inputTF = [[UITextField alloc] init];
inputTF.frame = CGRectMake(10, 4, XJWScreenW - 10 - 72, 42);
inputTF.placeholder = @"請(qǐng)輸入評(píng)論";
inputTF.tag = 1001;
inputTF.layer.cornerRadius = 5;
inputTF.layer.masksToBounds = YES;
self.commentTF = inputTF;
inputTF.backgroundColor = [UIColor redColor];
[inputTF addTarget:self action:@selector(textFieldEditChanged:) forControlEvents:UIControlEventEditingChanged];
[keyBoardTopView addSubview:inputTF];
self.commentView = keyBoardTopView;
    [self.view addSubview:keyBoardTopView];

[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardWillHide:) name:UIKeyboardWillHideNotification object:nil];

設(shè)置這個(gè)View的Y值是屏幕高度,這樣的話,就可以先達(dá)到把這個(gè)View隱藏起來(lái)的目的.然后點(diǎn)擊需要喚起鍵盤的按鈕,讓這個(gè)View里面的輸入框子控件,成為第一響應(yīng)者.通過(guò)監(jiān)聽(tīng)鍵盤彈出和收起的兩個(gè)通知,做相應(yīng)的動(dòng)畫處理(代碼如下)

(void)keyBoardWillShow:(NSNotification *)notification
{
// 獲取用戶信息
NSDictionary *userInfo = [NSDictionary dictionaryWithDictionary:notification.userInfo];
// 獲取鍵盤高度
CGRect keyBoardBounds = [[userInfo objectForKey:UIKeyboardFrameEndUserInfoKey] CGRectValue];
CGFloat keyBoardHeight = keyBoardBounds.size.height;
// 獲取鍵盤動(dòng)畫時(shí)間
CGFloat animationTime = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];

// 定義好動(dòng)作
void (^animation)(void) = ^void(void) {
    self.commentView.transform = CGAffineTransformMakeTranslation(0, -(keyBoardHeight + self.textView.bounds.size.height));
};

if (animationTime > 0) {
    [UIView animateWithDuration:animationTime animations:animation];
} else {
    animation();
}
}

(void)keyBoardWillHide:(NSNotification *)notificaiton
{

// 獲取用戶信息
NSDictionary *userInfo = [NSDictionary dictionaryWithDictionary:notificaiton.userInfo];
// 獲取鍵盤動(dòng)畫時(shí)間
CGFloat animationTime  = [[userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey] floatValue];

// 定義好動(dòng)作
void (^animation)(void) = ^void(void) {
    self.commentView.transform = CGAffineTransformIdentity;
};

if (animationTime > 0) {
    [UIView animateWithDuration:animationTime animations:animation];
} else {
    animation();
}}

注意：

UITextField單行文本輸入框，不能多行.

如果把UITextField換成UITextView，如果沒(méi)有對(duì)textView做內(nèi)容自適應(yīng)處理，多行的TextView，會(huì)被鍵盤遮擋.

讓這個(gè)View里面的輸入框子控件,成為第一響應(yīng)者.

方法三

根據(jù)前面兩個(gè)方法的思路，我把他們抽出來(lái)，封裝一個(gè)類

import <UIKit/UIKit.h>

typedef void (^XBTextViewBlcok)(NSString text);
@interface XJWTextView : UIView
/ 喚醒 */
@property (nonatomic,strong) UITextView textView;
/ 發(fā)送文本 /
@property (nonatomic,copy) XBTextViewBlcok TextBlcok;
/ 設(shè)置占位符 */
-(void)setPlaceholderText:(NSString *)text;
@end