R RichardN Well-Known Member Licensed User Longtime User Apr 26, 2020 #1 This is a problem that I am unable to properly debug without an iPhone X device in the current lock-down situation so I hope perhaps somebody has seen this before. The application has a module presenting a TextField and a CustomListView to search and display database data. These elements are loaded from a layout. The clvBrowse elements are simply two labels, again lazy-loaded from a layout. The elements look like this: B4X: Sub Process_Globals Private PageBrowse As Page Private clvBrowse As CustomListView Private txtClue As B4XView Private XUI As XUI Private pnlCellData As B4XView Private lblLine1, lblLine2 As B4XView End Sub The PageBrowse_Resize event is not utilised in this module so is absent. In both debug and release the app functions perfectly using my two test devices, an iPhone 6+ and an iPad Pro. I have deployed the app remotely to several colleagues to test but those with the iPhone 10 report the app crashes on re-orientation when this module displayed. In the current situation it may be some time before I can debug with an actual iPhone X. Why should this happen? Has anybody seen this behaviour before?
This is a problem that I am unable to properly debug without an iPhone X device in the current lock-down situation so I hope perhaps somebody has seen this before. The application has a module presenting a TextField and a CustomListView to search and display database data. These elements are loaded from a layout. The clvBrowse elements are simply two labels, again lazy-loaded from a layout. The elements look like this: B4X: Sub Process_Globals Private PageBrowse As Page Private clvBrowse As CustomListView Private txtClue As B4XView Private XUI As XUI Private pnlCellData As B4XView Private lblLine1, lblLine2 As B4XView End Sub The PageBrowse_Resize event is not utilised in this module so is absent. In both debug and release the app functions perfectly using my two test devices, an iPhone 6+ and an iPad Pro. I have deployed the app remotely to several colleagues to test but those with the iPhone 10 report the app crashes on re-orientation when this module displayed. In the current situation it may be some time before I can debug with an actual iPhone X. Why should this happen? Has anybody seen this behaviour before?
Erel B4X founder Staff member Licensed User Longtime User Apr 27, 2020 #2 It doesn't happen in this code. This is all that I can say. Upvote 0
R RichardN Well-Known Member Licensed User Longtime User Apr 27, 2020 #3 When I started the Lazy-Loading code for the CustomListView I was too lazy...... I populated the cell items from an SQL query in the TextSearch_RangeChanged event with SQL.ExecQuery("SELECT....") returning a Resultset that I then scrolled thorough to populate the cells added. Apparently that raises no issues with slower devices in either debug or release mode. However in faster devices like the iPhone X it evidently causes problems. I changed the code to use SQL.ExecQueryAsync("SELECT...") and then WAIT for SQL_QueryComplete before adding the data to the view. Changing to SQL.ExecQueryAsync is proving to be a little slower in older devices but no longer crashes the iPhone X. Upvote 0
When I started the Lazy-Loading code for the CustomListView I was too lazy...... I populated the cell items from an SQL query in the TextSearch_RangeChanged event with SQL.ExecQuery("SELECT....") returning a Resultset that I then scrolled thorough to populate the cells added. Apparently that raises no issues with slower devices in either debug or release mode. However in faster devices like the iPhone X it evidently causes problems. I changed the code to use SQL.ExecQueryAsync("SELECT...") and then WAIT for SQL_QueryComplete before adding the data to the view. Changing to SQL.ExecQueryAsync is proving to be a little slower in older devices but no longer crashes the iPhone X.
