key value observing - UITableView reloads row with unwanted fade when previous section is hidden -


i have uitableviewcontroller displays properties of nsmanagedobject in grouped tableview. values of properties can changed custom uitableviewcell subclasses have uisteppers , uitextfields. table has 9 sections, when of nsmanagedobject's properties nil, hide sections setting numberofrowsinsection 0, heightforheaderinsection , heightforfooterinsection 1. works fine; sections hidden.

the custom cells call delegate method changes nsmanagedobject's property values, , uitableviewcontroller set kvo observe properties of nsmanagedobject, , reload individual rows when corresponding properties change. here's beginning of method:

#define position 3 #define targeted_by 5  - (void)observevalueforkeypath:(nsstring *)keypath ofobject:(id)object change:(nsdictionary *)change context:(void *)context {     if ([keypath isequaltostring:@"positionx"]) {         [self.tableview reloadrowsatindexpaths:[nsarray arraywithobject:[nsindexpath indexpathforrow:0 insection:position]]                               withrowanimation:uitableviewrowanimationnone];      } else if ([keypath isequaltostring:@"positiony"]) {         [self.tableview reloadrowsatindexpaths:[nsarray arraywithobject:[nsindexpath indexpathforrow:1 insection:position]]                               withrowanimation:uitableviewrowanimationnone];      } else if ([keypath isequaltostring:@"istargetedby"]) {         [self.tableview reloadsections:[nsindexset indexsetwithindex:targeted_by]                       withrowanimation:uitableviewrowanimationnone];        } }

it's not complete method properties, idea.

the problem: when i've hidden section above properties, , change value of positionx, cell @ row 0 (the correct positionx cell) reloads not uitableviewrowanimationnone, appears uitableviewrowanimationfade. moves, , don't want to. subclass directly uitableviewcontroller, , there's no other method in class reloads rows or sections other -rowanimationnone. , when try reload whole section no animation, whole section animates. none of other rows in section behave this; reload correctly, no animation. , row 0 reloads no animation when section above not hidden.

i can work around calling [self.tableview reloaddata], i'd rather not way, sake of time , hackiness. have idea how prevent behavior?

this can complicated when many sections involved. think you're trying replicate free sensible tableview framework does. framework automatically generate sections based on managed object's data, , can determine sections make visible based on own rules. worth checking out save tons of time trying reinvent this.


Comments

Post a Comment

Popular posts from this blog

authentication - Mongodb revoke acccess to connect test database -

i have ec2 instance mongodb 3.2.0 installed. have user admin access. can connect user , perform operation remotely. 1 can connect database test remote if knows ip mongo 11.11.11.11. although not able make operations, want restrict access user credentials can connect server. first need create users , grant roles users, example: use admin db.createuser( { user: "myuseradmin", pwd: "abc123", roles: [ { role: "useradminanydatabase", db: "admin" } ] } ) then need start server --auth parameter mongod --auth more information here
Read more

r - Update two sets of radiobuttons reactively - shiny -

i have read ( how make choices in radiobuttons reactive in shiny? ) shows me how update radiobutton s in reactive way. however, when try , update 2 sets of buttons same data, 1 set renders. example: server: # create example data wafer <- rep(c(1:3), each=3) length <- c(1,1,2,1,1,1,3,5,1) width <- c(3,1,6,1,1,1,1,1,6) dd <- data.frame(wafer, length, width) shinyserver(function(input, output, session){ # create reactive dataframe store data values <- reactivevalues() values$df <- data.frame() # lengths , widths of wafer user input <- eventreactive(input$do, { subset(dd, wafer %in% input$wafer, select = length:width) }) # update reactive data frame lengths , widths have been selected user input observe({ if(!is.null(a())) { values$df <- rbind(isolate(values$df), a()) } }) output$wl <- renderdatatable({ a() }) # update radio buttons unique length , widths stored in values$df # ever "observe" put first in co...
Read more

ios - Realm over CoreData should I use NSFetchedResultController or a Dictionary? -

i'm working on app using core data , nsfetchedresultcontroller many reasons switch use realm. saw there "realm version" of nsfetchedresultcontroller on github wouldn't compatible current code using core data. the view controller displaying list of people same school, address book. list sublist of people studied in same city. so thinking make 1 unique request database retrieve list of people , filter locally list within 1 dictionary per school [string: anyobject] string section name within tableview , anyobject array of people. first solution, make nsfetchedresultcontroller each school predicate filtering location. delete actions etc.. handled delegates -> not compatible realm create dictionaries , update them each actions... -> works realm it's annoying code. any better solution? edit: i need clarify request: i'd write class inherit uitableviewcontroller. this class has list of people sorted in alphabetical order the tableview has ...
Read more