hey~i need to return none in a objc new class function,but it crash’s when i use return none.how can i solve it? thanks very much.
def tableView_trailingSwipeActionsConfigurationForRowAtIndexPath_(_self,_cmd,_tv,_indexPath):
return None
@cvp thanks
i have checked _objc_exception.txt and saw nothing in this crash.
try the example you provided,when i do a left swipe,it just show “delete” button.
i have no idea how the code below work
# set actions if swipe
UIContextualAction = ObjCClass('UIContextualAction').alloc()
UIContextualAction.setTitle_("Drizzel's action 😅")
# block does not have parameter nor return, thus we can use a Python def
UIContextualAction.setHandler_(handler)
UIContextualAction.setBackgroundColor_(ObjCClass('UIColor').blueColor().colorWithAlphaComponent(0.5))
UISwipeActionsConfiguration = ObjCClass('UISwipeActionsConfiguration').configurationWithActions_([UIContextualAction])
@cvp when i comment # return none,i got it.
thanks very much.
@ryubai I added this code some time ago to answer to @Drizzel 's question to have a particular action (button) when you swipe but this part of code is not needed.
@cvp i try the code below,but still crash,what’s the problem?
from objc_util import *
import ui
@on_main_thread
def main_tableview():
def tableView_numberOfRowsInSection_(_self, _cmd,_tv,_section):
return 3
def numberOfSectionsInTableView_(_self, _cmd,_tv):
return 1
def tableView_cellForRowAtIndexPath_(_self, _cmd,_tv,_indexpath):
cell=ObjCInstance(_tv).dequeueReusableCellWithIdentifier("cell1")
if cell==None:
cell=ObjCClass('UITableViewCell').alloc().initWithStyle_reuseIdentifier_(3,"cell2")
cell.textLabel().text = 'test'
return cell.ptr
def tableView_trailingSwipeActionsConfigurationForRowAtIndexPath_(_self,_cmd,_tv,_indexPath):
return None
tvc1 = create_objc_class('UITableViewController',ObjCClass('UITableViewController'),methods=[tableView_numberOfRowsInSection_,numberOfSectionsInTableView_,tableView_cellForRowAtIndexPath_,tableView_trailingSwipeActionsConfigurationForRowAtIndexPath_])
return tvc1.alloc().init().autorelease()
@on_main_thread
def main():
root_vc = UIApplication.sharedApplication().keyWindow().rootViewController()
tbc=main_tableview()
root_vc.presentViewController_animated_completion_(tbc, True, None)
if __name__=='__main__':
main()
@ryubai try
create_objc_class('UITableViewController',ObjCClass('UIViewController'),...
You had defined as superclass the same class UITableViewController.
So, you don't have a crash but the view seems transparent.
You can start with,
tvc1 = ObjCClass('UITableViewController')
So, you see the TableView but empty as the delegates are not called
Is returning None valid when working with objc? I can't remember if that gets translated to a null pointer. You may need to return 0, or c_void_p(0)
@JonB No, no, it was ok with None, as I said in my first reply
@cvp i don’t understand how to .. i want to subclass a UITableViewcontroller and add a action when i left swipe a cell.
could you show me the right way in the code i provided?
sorry for my poor understanding.
@ryubai I'm sorry but I also have some understanding's problem with UITableViewController.
Why don't you want to use a UITableView as subview of an ui.TableView?
@ryubai this should work with an UITableViewController as you asked
# coding: utf-8
from __future__ import absolute_import
from objc_util import *
import ui
from collections import OrderedDict
from six.moves import range
import console
UITableView = ObjCClass('UITableViewController')
UITableViewCell = ObjCClass('UITableViewCell')
class UITableViewStyle(object):
UITableViewStylePlain = 0
UITableViewStyleGrouped = 1
def test_data(number):
data = OrderedDict()
valueRange = 7
for i in range(0,number):
ii = i * valueRange
key = str(ii)
value = []
for j in range(ii,ii+valueRange):
value.append(str(j))
data[key] = value
return data
data = test_data(1)
def tableView_cellForRowAtIndexPath_(self,cmd,tableView,indexPath):
ip = ObjCInstance(indexPath)
cell = ObjCInstance(tableView).dequeueReusableCellWithIdentifier_('mycell')
if cell == None:
cell = UITableViewCell.alloc().initWithStyle_reuseIdentifier_(0,'mycell')
key = list(data.keys())[ip.section()]
text = ns(data[key][ip.row()])
cell.textLabel().setText_(text)
return cell.ptr
def numberOfSectionsInTableView_(self,cmd,tableView):
return len(data)
def tableView_numberOfRowsInSection_(self,cmd, tableView,section):
key = list(data.keys())[section]
return ns(len(data[key])).integerValue()
def sectionIndexTitlesForTableView_(self,cmd,tableView):
return ns(list(data.keys())).ptr
def tableView_sectionForSectionIndexTitle_atIndex_(self,cmd,tableView,title,index):
#I have assumed order and number of list is the same from list and sections
return index
def tableView_titleForHeaderInSection_(self,cmd,tableView,section):
return ns('Header for ' + list(data.keys())[section]).ptr
def tableView_viewForHeaderInSection_(self,cmd,tableView,section):
print('ici')
return ns('Header for ' + list(data.keys())[section]).pt
def tableView_heightForHeaderInSection_(self,cmd,tableView,section):
return 50.0
def tableView_titleForFooterInSection_(self,cmd,tableView,section):
return ns('Footer for ' + list(data.keys())[section]).ptr
def tableView_commitEditingStyle_forRowAtIndexPath_(self,cmd,tableView,editingStyle,indexPath):
if editingStyle == 1:
# delete
section_row = ObjCInstance(indexPath)
tv = ObjCInstance(tableView)
row = section_row.row()
b = console.alert('delete row',str(row), 'confirm', 'cancel', hide_cancel_button=True)
if b == 1:
pass
#tv.beginUpdates()
#?.removeAtIndex(indexPath.row)
#tv.deleteRowsAtIndexPaths_withRowAnimation_([section_row],0)
#tv.endUpdates()
#def tableView_canEditRowAtIndexPath_(self,cmd,tableView,indexPath):
#pass
#def tableView_canMoveRowAtIndexPath_(self,cmd,tableView,indexPath):
#pass
#def tableView_moveRowAtIndexPath_toIndexPath_(self,cmd,tableView,fromIndexPath,toIndexPath):
#pass
methods = [tableView_cellForRowAtIndexPath_,tableView_numberOfRowsInSection_,numberOfSectionsInTableView_,tableView_titleForHeaderInSection_,tableView_sectionForSectionIndexTitle_atIndex_,sectionIndexTitlesForTableView_,tableView_titleForFooterInSection_, tableView_commitEditingStyle_forRowAtIndexPath_]#, tableView_viewForHeaderInSection_, tableView_heightForHeaderInSection_]
protocols = ['UITableViewDataSource']
TVDataSourceAndDelegate = create_objc_class('TVDataSourceAndDelegate', NSObject, methods=methods, protocols=protocols)
#=============== TableView delegate: begin
def tableView_trailingSwipeActionsConfigurationForRowAtIndexPath_(self,cmd, tableView, indexPath):
global UISwipeActionsConfiguration
#return None
return UISwipeActionsConfiguration.ptr
methods = [tableView_trailingSwipeActionsConfigurationForRowAtIndexPath_]
protocols = ['UITableViewDelegate']
UITableViewDelegate = create_objc_class('UITableViewDelegate', NSObject, methods=methods, protocols=protocols)
#=============== TableView delegate: end
def handler():
print('handler called')
return
@on_main_thread
def Main():
global UISwipeActionsConfiguration
root_vc = UIApplication.sharedApplication().keyWindow().rootViewController()
tableviewcontroller = UITableView.alloc().initWithStyle_(UITableViewStyle.UITableViewStylePlain)
#=============== TableView delegate: begin
#set delegate
tb_ds = TVDataSourceAndDelegate.alloc().init().autorelease()
tableviewcontroller.tableView().setDataSource_(tb_ds)
tb_dl = UITableViewDelegate.alloc().init().autorelease()
tableviewcontroller.tableView().setDelegate_(tb_dl)
# set actions if swipe
UIContextualAction = ObjCClass('UIContextualAction').alloc()
UIContextualAction.setTitle_("@Ryubai's' action 😅")
# block does not have parameter nor return, thus we can use a Python def
UIContextualAction.setHandler_(handler)
UIContextualAction.setBackgroundColor_(ObjCClass('UIColor').blueColor().colorWithAlphaComponent(0.5))
UISwipeActionsConfiguration = ObjCClass('UISwipeActionsConfiguration').configurationWithActions_([UIContextualAction])
#=============== TableView delegate: end
root_vc.presentViewController_animated_completion_(tableviewcontroller, True, None)
if __name__ == '__main__':
Main()
@cvp thank you very much.
i prefer to use uitableviewcontroller,it connect data source and delegate automatically.
your code works but when I transfer to UITableViewController,it crashs.
@ryubai said:
when I transfer to UITableViewController,it crashs.
Sorry, I don't understand "transfer"