UITextView 文本輸入框

////別忘在 .h 中寫代理  <UITextViewDelegate>

///UILabel 顯示的文本只讀，無法編輯，可以根據文字個數自動換行；
///UITextField 可編輯本文，但是無法換行，只能在一行顯示；當點擊鍵盤上的return時會收到一個事件做一些事情。
////UITextView 可編輯文本，提供換行功能。
UITextView* textView = [[UITextView alloc] initWithFrame:CGRectMake(10, 10, 300, 100)];
    textView.backgroundColor = [UIColor grayColor];
    //文本
    textView.text = @"aa";
    //字體
    textView.font = [UIFont boldSystemFontOfSize:20.0];
    //對齊
    textView.textAlignment = NSTextAlignmentCenter;
    //字體顏色
    textView.textColor = [UIColor redColor];
    //允許編輯
    textView.editable = YES;
    //用戶交互     /////////////////////若想有滾動條 不能交互 上為No，下為Yes
    textView.userInteractionEnabled = YES; ///
    //自定義鍵盤
    //textView.inputView = view;
    //textView.inputAccessoryView = view;
    textView.delegate = self;
    [self.view addSubview:textView];
    //[textView release];
//////////事件

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
//判斷類型，如果是UITextView類型，收起鍵盤
for (UIView* view in self.view.subviews) {
    if ([view isKindOfClass:[UITextView class]]) {
        UITextView* tv = (UITextView*)view;
        [tv resignFirstResponder];
    }
}

}

(BOOL)textViewShouldBeginEditing:(UITextView *)textView{
  return YES;
}
(BOOL)textViewShouldEndEditing:(UITextView *)textView{
  return YES;
}

(void)textViewDidBeginEditing:(UITextView *)textView{
  NSLog(@"開始編輯");
}

(void)textViewDidEndEditing:(UITextView *)textView{
  NSLog(@"結束編輯");
}

(BOOL)textView:(UITextView )textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString )text{
return YES;
}

(void)textViewDidChange:(UITextView *)textView{
  NSLog(@"已經修改");
}

(void)textViewDidChangeSelection:(UITextView *)textView{
  NSLog(@"textViewDidChangeSelection");
}</pre>