在新行中插入文本而不删除iOS中“文本视图”中的上一个文本

Question

我正在尝试在新行中插入文本，而不删除文本视图中的上一个文本。我在iOS上很新，所以我很难解决这个问题。提前致谢

Answer 1

You can do it quite easily by using the following code :

NSString *oldText,*newText,*myString; 




- (IBAction)addNewItem:(id)sender {
[self updateTextField];

}

    - (BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [textField resignFirstResponder];

    return YES;
}



 -(void)updateTextField
{
    oldText=displayTextView.text;
    newText=entryTextField.text;
    myString = [newText stringByAppendingFormat:@"\n"];
    myString = [myString stringByAppendingString:oldText];
    displayTextView.text=myString;


}

Answer 2

试试这个

将\ n添加到字符串时，它将转换为新的行符号

  aTextView.text = [NSString stringWithFormat:@"%@\n%@",aTextView.text,@"Second Line"];

Answer 3

textView.text = [(textView.text ?: @"") stringByAppendingString:(myText ?: @"")];