Question

如何根据输入内容让TextView自动调整高度

Answer 1

设置TextView的属性

<TextView android:id="@+id/textView1"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Open" />

 重点是  android:layout_height="wrap_content"

Answer 2

- (void)textViewDidChange:(UITextView *)textView{
if(textView.text.length > 20)//一行最多多少字节
{
//TextView底面背景图片根据内容自动调整高度
UIImage *img = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"inputbox"ofType:@"png"]];
[BgImage setImage:[img stretchableImageWithLeftCapWidth:21 topCapHeight:14]];

UIFont *font = [UIFont systemFontOfSize:12];
CGSize size = [textView.text sizeWithFont:font constrainedToSize:CGSizeMake(320, 140)lineBreakMode:UILineBreakModeWordWrap];
BgImage.frame = CGRectMake(0, 202-size.height+15, 320, size.height+28);
InputTextVeiw.contentInset = UIEdgeInsetsZero;//以换行为基准
[textView setFrame:CGRectMake(51, 210-size.height+18, 200, size.height+5)];