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一、新建一个textView
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | //初始化 UITextView *textView = [[[UITextView alloc] init] autorelease]; //设置代理 需在interface中声明UITextViewDelegate textView.delegate = self; //字体大小 textView.font = [UIFont systemFontOfSize:16]; //添加滚动区域 textView.contentInset = UIEdgeInsetsMake(-11, -6, 0, 0); //是否可以滚动 textView.scrollEnabled = NO; //获得焦点 [textView becomeFirstResponder]; |
| 1 | [self.view addSubview:textView]; |
二、键盘操作
| 1 2 3 4 5 | //返回键的类型 textView.returnKeyType = UIReturnKeyDefault; //键盘类型 textView.keyboardType = UIKeyboardTypeDefault; |
三、隐藏键盘的几种方式
个人还是认为最方便的是在键盘上加上一个ToolBar，在上面加上一个按钮来隐藏键盘
①在键盘上加上隐藏按钮
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 | //定义一个toolBar UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)]; //设置style [topView setBarStyle:UIBarStyleBlack]; //定义两个flexibleSpace的button，放在toolBar上，这样完成按钮就会在最右边 UIBarButtonItem * button1 =[[UIBarButtonItem alloc]initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target:self action:nil]; UIBarButtonItem * button2 = [[UIBarButtonItem alloc]initWithBarButtonSystemItem: UIBarButtonSystemItemFlexibleSpace target:self action:nil]; //定义完成按钮 UIBarButtonItem * doneButton = [[UIBarButtonItem alloc]initWithTitle:@ "完成" style:UIBarButtonItemStyleDone target:self action:@selector(resignKeyboard)]; //在toolBar上加上这些按钮 NSArray * buttonsArray = [NSArray arrayWithObjects:button1,button2,doneButton,nil]; [topView setItems:buttonsArray]; [textView setInputAccessoryView:topView]; |
| 1 2 3 4 | //隐藏键盘 - ( void )resignKeyboard { [textView resignFirstResponder]; } |
还有几种也可隐藏键盘的方式
②用回车键，前提是你的textView中不需要用到回车键
| 1 2 3 4 5 6 7 | -( BOOL )textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text { if ([text isEqualToString:@ "\n" ]) { [textView resignFirstResponder]; return NO; } return YES; } |
③触摸空白处隐藏键盘
| 1 2 3 4 5 | -( void )touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event { //隐藏键盘 [textView resignFirstResponder]; } |
四、使键盘不挡住输入框
在view中添加一个子view，设置此子view的tag值为1000，在此view上添加一个textView和一个发送按钮，如下图；我们要达到textView的键盘弹出时，整个View往上平移，键盘消失，view往下平移的效果，模拟发送短信的界面。
设置textView圆角
| 1 2 | //设置textView圆角 [self.textView.layer setCornerRadius:10]; |
①、在viewWillAppear中添加键盘监听事件
| 1 2 3 4 5 6 7 | //添加键盘的监听事件 //注册通知,监听键盘弹出事件 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidShow:) name:UIKeyboardDidShowNotification object:nil]; //注册通知,监听键盘消失事件 [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardDidHidden) name:UIKeyboardDidHideNotification object:nil]; |
在.m文件#import后面添加
| 1 2 3 4 | //动画时间 #define kAnimationDuration 0.2 //view高度 #define kViewHeight 56 |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | // 键盘弹出时 -( void )keyboardDidShow:(NSNotification *)notification { //获取键盘高度 NSValue *keyboardObject = [[notification userInfo] objectForKey:UIKeyboardFrameEndUserInfoKey]; CGRect keyboardRect; [keyboardObject getValue:&keyboardRect]; //调整放置有textView的view的位置 //设置动画 [UIView beginAnimations:nil context:nil]; //定义动画时间 [UIView setAnimationDuration:kAnimationDuration]; //设置view的frame，往上平移 [(UIView *)[self.view viewWithTag:1000] setFrame:CGRectMake(0, self.view.frame.size.height-keyboardRect.size.height-kViewHeight, 320, kViewHeight)]; [UIView commitAnimations]; } |
| 1 2 3 4 5 6 7 8 9 10 | //键盘消失时 -( void )keyboardDidHidden { //定义动画 [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:kAnimationDuration]; //设置view的frame，往下平移 [(UIView *)[self.view viewWithTag:1000] setFrame:CGRectMake(0, self.view.frame.size.height-kViewHeight, 320, kViewHeight)]; [UIView commitAnimations]; } |
效果图：
iOS7光标问题
PS：有网友遇到textView在ios7上出现编辑进入最后一行时光标消失，看不到最后一行，变成盲打，stackOverFlow网站上有大神指出，是ios7本身bug，加上下面一段代码即可（网友调试得出，在此mark一下，有问题，欢迎大神们指出）
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 | -( void )textViewDidChange:(UITextView *)textView { CGRect line = [textView caretRectForPosition: textView.selectedTextRange.start]; CGFloat overflow = line.origin.y + line.size.height - ( textView.contentOffset.y + textView.bounds.size.height - textView.contentInset.bottom - textView.contentInset.top ); if ( overflow > 0 ) { // We are at the bottom of the visible text and introduced a line feed, scroll down (iOS 7 does not do it) // Scroll caret to visible area CGPoint offset = textView.contentOffset; offset.y += overflow + 7; // leave 7 pixels margin // Cannot animate with setContentOffset:animated: or caret will not appear [UIView animateWithDuration:.2 animations:^{ [textView setContentOffset:offset]; }]; } } |
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