swift UITableView set rowHeight

Question

I am trying to set the height of each row in the tableView to the height of the corresponding cell with this code   override func tableView tableView  UITableView   heightForRowAtIndexPath indexPath  NSIndexPath   - gt  CGFloat         var cell   tableView cellForRowAtIndexPath indexPath        return cell frame height     I get this error when initialising var cell        Thread 1 EXC BAD ACCESS code 2 address 0x306d2c

User · Answer

Problem Cause  The problem is that the cell has not been created yet  TableView first calculates the height for row and then populates the data for each row  so the rows array has not been created when heightForRow method gets called  So your app is trying to access a memory location which it does not have the permission to and therefor you get the EXC BAD ACCESS message    How to achieve self sizing TableViewCell in UITableView  Just set proper constraints for your views contained in TableViewCell s view in StoryBoard  Remember you shouldn t set height constraints to TableViewCell s root view  its height should be properly computable by the height of its subviews -- This is like what you do to set proper constraints for UIScrollView  This way your cells will get different heights according to their subviews  No additional action needed

User · Answer

yourTableView rowHeight   UITableViewAutomaticDimension   Try this

User · Answer

Make sure Your TableView Delegate are working as well  if not then in your story board or in  xib  press and hold Control   right click on tableView drag and Drop to your Current ViewController  swift 2 0  func tableView tableView  UITableView  heightForRowAtIndexPath indexPath  NSIndexPath  - gt  CGFloat       return 60 0

User · Answer

For setting row height there is separate method    For Swift 3  func tableView   tableView  UITableView  heightForRowAt indexPath  IndexPath  - gt  CGFloat       return 100 0   Choose your custom row height     Older Swift uses  func tableView tableView  UITableView  heightForRowAtIndexPath indexPath  NSIndexPath  - gt  CGFloat       return 100 0   Choose your custom row height     Otherwise you can set row height using   self tableView rowHeight   44 0   In ViewDidLoad

User · Answer

Put the default rowHeight in viewDidLoad or awakeFromNib  As pointed out by Martin R   you cannot call cellForRowAtIndexPath from heightForRowAtIndexPath  self tableView rowHeight   44 0

User · Answer

As pointed out in comments  you cannot call cellForRowAtIndexPath inside heightForRowAtIndexPath    What you can do is creating a template cell used to populate with your data and then compute its height  This cell doesn t participate to the table rendering  and it can be reused to calculate the height of each table cell   Briefly  it consists of configuring the template cell with the data you want to display  make it resize accordingly to the content  and then read its height   I have taken this code from a project I am working on - unfortunately it s in Objective C  I don t think you will have problems translating to swift  -  CGFloat  tableView  UITableView   tableView heightForRowAtIndexPath  NSIndexPath   indexPath       static PostCommentCell  sizingCell   nil      static dispatch once t onceToken      dispatch once  amp onceToken             sizingCell    self tblComments dequeueReusableCellWithIdentifier POST COMMENT CELL IDENTIFIER                sizingCell comment   self comments indexPath row        sizingCell setNeedsLayout        sizingCell layoutIfNeeded        CGSize size    sizingCell contentView systemLayoutSizeFittingSize UILayoutFittingCompressedSize       return size height

User · Answer

Try code like this copy and paste in the class  func tableView   tableView  UITableView  heightForRowAt indexPath  IndexPath  - gt  CGFloat       return 100

User · Answer

func tableView   tableView  UITableView  heightForRowAt indexPath  IndexPath  - gt  CGFloat               var height CGFloat   CGFloat               if indexPath row    1                   height   150                           else                   height   50                            return height

[xcode] swift UITableView set rowHeight

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