//初始化并定義大小
UITextView *textview = [[UITextView alloc] initWithFrame:CGRectMake(20, 10, 280, 30)];
textview.backgroundColor=[UIColor whiteColor]; //背景色
textview.scrollEnabled = NO;? ? //當(dāng)文字超過視圖的邊框時(shí)是否允許滑動(dòng)坡脐，默認(rèn)為“YES”
textview.editable = YES;? ? ? ? //是否允許編輯內(nèi)容揽趾，默認(rèn)為“YES”
textview.delegate = self;? ? ? //設(shè)置代理方法的實(shí)現(xiàn)類
textview.font=[UIFont fontWithName:@"Arial" size:18.0]; //設(shè)置字體名字和字體大小;
textview.returnKeyType = UIReturnKeyDefault;//return鍵的類型
textview.keyboardType = UIKeyboardTypeDefault;//鍵盤類型
textview.textAlignment = NSTextAlignmentLeft; //文本顯示的位置默認(rèn)為居左
textview.dataDetectorTypes = UIDataDetectorTypeAll; //顯示數(shù)據(jù)類型的連接模式（如電話號(hào)碼阐滩、網(wǎng)址滥壕、地址等）
textview.textColor = [UIColor blackColor];
textview.text = @"UITextView詳解";//設(shè)置顯示的文本內(nèi)容
[self.view addSubview:textview];
UITextView的代理方法如下:
//將要開始編輯
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView;
//將要結(jié)束編輯
- (BOOL)textViewShouldEndEditing:(UITextView *)textView;
//開始編輯
- (void)textViewDidBeginEditing:(UITextView *)textView;
//結(jié)束編輯
- (void)textViewDidEndEditing:(UITextView *)textView;
//內(nèi)容將要發(fā)生改變編輯
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text;
//內(nèi)容發(fā)生改變編輯
- (void)textViewDidChange:(UITextView *)textView;
//焦點(diǎn)發(fā)生改變
- (void)textViewDidChangeSelection:(UITextView *)textView;
有時(shí)候我們要控件自適應(yīng)輸入的文本的內(nèi)容的高度崇堰，只要在textViewDidChange的代理方法中加入調(diào)整控件大小的代理即可
- (void)textViewDidChange:(UITextView *)textView{
//計(jì)算文本的高度
CGSize constraintSize;
constraintSize.width = textView.frame.size.width-16;
constraintSize.height = MAXFLOAT;
CGSize sizeFrame =[textView.text sizeWithFont:textView.font
constrainedToSize:constraintSize
lineBreakMode:UILineBreakModeWordWrap];
//重新調(diào)整textView的高度
textView.frame = CGRectMake(textView.frame.origin.x,textView.frame.origin.y,textView.frame.size.width,sizeFrame.height+5);
}
控制輸入文字的長(zhǎng)度和內(nèi)容，可通調(diào)用以下代理方法實(shí)現(xiàn)
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
if (range.location>=100)
{
//控制輸入文本的長(zhǎng)度
return? NO;
}
if ([text isEqualToString:@"\n"]) {
//禁止輸入換行
return NO;
}
else
{
return YES;
}
}
UITextView退出鍵盤的幾種方式
因?yàn)閕phone的軟鍵盤沒有自帶的退鍵盤鍵卦碾，所以要實(shí)現(xiàn)退出鍵盤需要自己實(shí)現(xiàn)物喷，有如下幾種方式：
1）如果你程序是有導(dǎo)航條的，可以在導(dǎo)航條上面加多一個(gè)Done的按鈕邻邮，用來退出鍵盤竣况，當(dāng)然要先實(shí)UITextViewDelegate。
- (void)textViewDidBeginEditing:(UITextView *)textView {
UIBarButtonItem *done =? ? [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
target:self
action:@selector(dismissKeyBoard)];
self.navigationItem.rightBarButtonItem = done;
[done release];
done = nil;
}
- (void)textViewDidEndEditing:(UITextView *)textView {
self.navigationItem.rightBarButtonItem = nil;
}
- (void)dismissKeyBoard {
[self.textView resignFirstResponder];
}
2）如果你的textview里不用回車鍵筒严，可以把回車鍵當(dāng)做退出鍵盤的響應(yīng)鍵丹泉。
代碼如下：
-(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
if ([text isEqualToString:@"\n"]) {
[textView resignFirstResponder];
return NO;
}
return YES;
}
3）還有你也可以自定義其他加載鍵盤上面用來退出，比如在彈出的鍵盤上面加一個(gè)view來放置退出鍵盤的Done按鈕鸭蛙。
代碼如下：
UIToolbar * topView = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 0, 320, 30)];
[topView setBarStyle:UIBarStyleBlack];
UIBarButtonItem *btnSpace = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace
target:self
action:nil];
UIBarButtonItem *doneButton = [[UIBarButtonItem alloc]initWithTitle:@"Done"
style:UIBarButtonItemStyleDone
target:self
action:@selector(dismissKeyBoard)];
NSArray * buttonsArray = @[btnSpace, doneButton];;
[doneButton release];
[btnSpace release];
[topView setItems:buttonsArray];
[textView setInputAccessoryView:topView];//當(dāng)文本輸入框加上topView
[topView release];
topView = nil;
-(IBAction)dismissKeyBoard
{
[tvTextView resignFirstResponder];
}
