UILabel和UITextView自適應高度

//uilabel自動換行，自適應高度

uilabel *label = [[uilabel alloc] initwithframe:cgrectzero];

[label setbackgroundcolor:[uicolor clearcolor]];

[label setfont:[uifont systemfontofsize:14]];

[label setlinebreakmode:uilinebreakmodewordwrap];

[label setnumberoflines:0];

[self.view addsubview:label];

nsstring *str = @"那些年錯過的大雨那些年錯過的愛情好想擁抱你擁抱錯過的勇氣曾經想征服全世界到最後回首才發現這世界滴滴點點全部都是你那些年錯過的大雨那些年錯過的愛情好想告訴你告訴你我沒有忘記那天晚上滿天星星平行時空下的約定再一次相遇我會緊緊抱著你緊緊抱著你";

cgsize size = [str sizewithfont:[uifont systemfontofsize:14] constrainedtosize:cgsizemake(320,500) linebreakmode:uilinebreakmodewordwrap];

[label settext:str];

[label setframe:cgrectmake(0.0f, 20.0f, size.width, size.height)];

[label release];

//uitextview自動換行，自適應高度

uitextview *textview = [[uitextview alloc] initwithframe:cgrectmake(0, 150, 320, 240)];

textview.backgroundcolor = [uicolor clearcolor];

textview.text = str;

textview.scrollenabled = yes;

textview.font = [uifont systemfontofsize:14];

textview.userinteractionenabled = no;

textview.autoresizingmask = uiviewautoresizingflexibleheight;

[self.view addsubview:textview];