ios - Strange behavior of UIScrollView with Constraints and RTL -


i have horizontal scroll view on add views dynamically. on ltr languages work fine, add views 1 after other left right. on rtl problem views added left of scroll instead of right in every other controller, really strange staff order of views added correctly, left of first view ordered right left outside of scroll view on -x.

here code when add new view:

tag* tag = [self.storyboard instantiateviewcontrollerwithidentifier:@"tag" ]; [_scroller addsubview:tag.view]; [tags addobject:tag]; tag* prev = nil (tag* tag in tags) {     if (prev == nil)     {         [_scroller addconstraint:[nslayoutconstraint constraintwithitem:tag.view                                                         attribute:nslayoutattributeleading                                                                                                                                                  relatedby:nslayoutrelationequal                                                                      toitem:_scroller                                                                   attribute:nslayoutattributeleading                                                                  multiplier:1.0f                                                                    constant:0]];     }     else     {         [_scroller addconstraints:[nslayoutconstraint constraintswithvisualformat:@"[prev]-10-[tag]"                                                                           options:0                                                                           metrics:nil                                                                             views:@{@"tag" : tag.view, @"prev" : prev.view}]];     }      [_scroller addconstraint:[nslayoutconstraint constraintwithitem:tag.view                                                           attribute:nslayoutattributecentery                                                           relatedby:nslayoutrelationequal                                                              toitem:_scroller                                                           attribute:nslayoutattributecentery                                                              multiplier:1.0f                                                                constant:0]];     prev = tag;  }

here image of how suppose work on ltr , rtl , how works enter image description here

it sounds better approach might use uicollectionview. if want start right side possibly this:

nsindexpath *lastindex = [nsindexpath indexpathforitem:data.count - 1                                               insection:0]; [self.collectionview scrolltoitematindexpath:lastindex                              atscrollposition:uicollectionviewscrollpositionright                                      animated:no];

this way uicollectionviewflowlayout can handle placement you.


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