如何在UITextView中获取文本矩形

Question

我在UItextView中遇到了文本的text rect，我正在使用这个代码。

UITextPosition *Pos2 = [textView positionFromPosition: drawTextView.endOfDocument offset: 0];
    UITextPosition *Pos1 = [textView positionFromPosition: drawTextView.endOfDocument offset: -[textView.text length]];

    UITextRange *range = [textView textRangeFromPosition:Pos1 toPosition:Pos2];

    CGRect result1 = [textView firstRectForRange:(UITextRange *)range ];

but it returns meorigin=(x=+Inf，y=+Inf) size=(width=0，height=0)`

Answer 1

请检查以下内容：

CGRect size = [myTextView.text boundingRectWithSize:CGSizeMake(textView.frame.size.width, Max_height)
                                                     options:NSStringDrawingUsesLineFragmentOrigin
                                                  attributes:attributesDictionary
                                                     context:nil];
NSLog(@"height : %@" size.height);

Answer 2

您可以使用以下代码来获取它

- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{   
    CGRect rc = [textView bounds];
    rc = [textView convertRect:rc toView:superViewOfTextView];
    .
    .
    .
    //Put your logic.

}

要获取文本和宽度和高度，请使用

CGFloat width = [self.txtView.text length];
CGFloat height = [self.txtView.text sizeWithFont:setFontWithSize constrainedToSize:self.txtView.frame.size.width lineBreakMode:NSLineBreakByWordWrapping];