ios - How to adjust super view 's height base on subview's size in XIB? -

-

in xcode 6 ,i create xib custom view (named: viewa,got red background color) ,and viewa's xib got file size 600*600, in viewa ,i put subview labelb (got green background color )in ,and labelb's numberoflines = 0 ,so labelb'height variable , want viewa 's height changed based on labelb's height (e.g viewa.bottom = labelb.bottom + 10), , have pin labelb's top,bottom,trailing,leading viewa, still doesn't !work ,the viewa's height 600 ,no matter label's height . how can achieve goal in auto layout? thanks

enter image description here

using auto layout, here's need do:

  1. make sure aren't adding fixed width and/or height constraints of subviews (depending on dimension(s) want dynamically size). idea let intrinsic content size of each subview determine subview's height. uilabels come 4 automatic implicit constraints (with less required priority) attempt keep label's frame @ exact size required fit text inside.

  2. make sure edges of each label connected rigidly (with required priority constraints) edges of each other , superview. want make sure if imagine 1 of labels growing in size, force other labels make room , importantly force superview expand well.

  3. only add constraints superview set position, not size (at least, not dimension(s) want size dynamically). remember if set internal constraints correctly, size determined sizes of subviews, since edges connected theirs in fashion.

  4. make sure change view's translatesautoresizingmaskintoconstraints property value no before applying constraints.

that's it. don't need call sizetofit or systemlayoutsizefittingsize: work, load views , set text , should it. system layout engine calculations solve constraints. (if anything, might need call setneedslayout on superview...but shouldn't required.)

you can check original answer here


Comments

Post a Comment

Popular posts from this blog

java - Oracle EBS .ClassNotFoundException: oracle.apps.fnd.formsClient.FormsLauncher.class ERROR -

-
i need in configuring java on machine because, when try loading forms, loader goes in circles , gives error: java.lang.classnotfoundexception: oracle.apps.fnd.formsclient.formslauncher.class @ sun.plugin2.applet.applet2classloader.findclass(unknown source) @ sun.plugin2.applet.plugin2classloader.loadclass0(unknown source) @ sun.plugin2.applet.plugin2classloader.loadclass(unknown source) @ sun.plugin2.applet.plugin2classloader.loadclass(unknown source) @ java.lang.classloader.loadclass(unknown source) @ sun.plugin2.applet.plugin2classloader.loadcode(unknown source) @ sun.plugin2.applet.plugin2manager.createapplet(unknown source) @ sun.plugin2.applet.plugin2manager$appletexecutionrunnable.run (unknown source) @ java.lang.thread.run(unknown source) i have tried re-installing firefox, older versions of java runtime environments, disabling proxy. what missing? application working on other machines. i spent around 100 hours finding s
Read more

c# - how to use buttonedit in devexpress gridcontrol -

-
Image
i trying create gridcontrol buttonedit in 1 of columns. when user clicks button edit, popups form select product. when selection done on popup, returns datarow selection main grid below. but when column loses focus, value wrote column disappear. here code creates gridcontrol's data , buttonedit's click event. private void frmsiparisnew_load(object sender, eventargs e) { dt = new datatable(); dt.columns.add("malzeme_kodu",typeof(string)); dt.columns.add("malzeme_aciklama", typeof(string)); dt.columns.add("adet", typeof(decimal)); dt.columns.add("birim", typeof(string)); dt.columns.add("fiyat", typeof(decimal)); dt.columns.add("kur", typeof(string)); dt.columns.add("tutar", typeof(decimal)); datarow dr = dt.newrow(); dt.rows.add(dr); gc.datasource = dt; } private void repositoryitembuttoneditmal
Read more

How do you convert a timestamp into a datetime in python with the correct timezone? -

-
you naively expect work: import pytz datetime import datetime def tz_datetime_from_timestamp(timestamp): """convert timestamp datetime """ tz = pytz.timezone('australia/perth') server_time = datetime.utcnow() delta = tz.utcoffset(server_time) value = datetime.utcfromtimestamp(timestamp).replace(tzinfo=tz) return value + delta print tz_datetime_from_timestamp(1416387060) and convert timestamp 1416387060 wed nov 19 16:51:00 2014 gmt+8:00. ...but not. prints: 2014-11-19 16:51:00+07:43 the timezone of australia/perth not gmt+7:43. it gmt+8:00. unequivocally stated on australian government website http://www.australia.gov.au/about-australia/our-country/time : awst equal coordinated universal time plus 8 hours (utc +8). so, heck pytz pulling 7.43 from? well, turns out pytz pulls data http://www.iana.org/time-zones time zone database, , database states: # western australia # # rule name type in on @
Read more