UITextView ContentSize.Height在iOS 6上太高了

Question

我有以下代码来计算UITableView单元格的高度。

  UIFont *textFont = [SettingsManagerUI defaultFontItalicWithSize:14];

  UIView *tempView = [[UIView alloc] init];

  UITextView *locationText = [[UITextView alloc] init];
  UITextView *moreInfoText = [[UITextView alloc] init];

  [tempView addSubview:locationText];
  [tempView addSubview:moreInfoText];

  [locationText setFont:textFont];
  [moreInfoText setFont:textFont];

  NSString *locationDetails = [MembersSavePartnerDetailsMoreInfoTableCell generateLocationTextWithPartner:partner inLocation:location];
  locationText.text = locationDetails;

  NSString *moreInfo = partner ? partner.partnerDescription : location.partner.partnerDescription;
  moreInfoText.text = moreInfo;

  float locationTextHeight = locationText.contentSize.height;
  float moreInfoTextHeight = moreInfoText.contentSize.height;

在iOS 5.1.1中，locationTextHeight为88，moreInfoTextHeight = 52.在iOS 6中，高度分别为1420和2482.

为什么iOS 6中的高度不同，我该如何解决这个问题呢？

Answer 1

问题是由于没有用框架初始化UITextView引起的。

UITextView *locationText = [[UITextView alloc] initWithFrame:CGFrameMake(0,0,200,20)];
UITextView *moreInfoText = [[UITextView alloc] initWithFrame:CGFrameMake(0,0,200,20)];

在iOS 6之前，UITextView必须有一个宽度大于0的默认框架。