iOS人机交互规范(14)

iOS人机交互规范,为iPhone,iPad开发人员提供设计规范

OnscreenUserHelpIsMinimal

PreferencesintheSettingsappareofthe“setonceandrarelychange”type.Althoughsomeofthebuilt-inapplicationshavethistypeofpreferenceintheSettingsapp,mostappsdonotneedthistype,sotheydon’thavepreferencesintheSettingsapp.

OnscreenUserHelpIsMinimal

Mobileusershaveneitherthetimenorthedesiretoreadthroughalotofhelpcontentbeforetheycanbenefitfromanapplication.What’smore,helpcontenttakesupvaluablespacetostoreanddisplay.

iOS-baseddevicesandtheirbuilt-inapplicationsareintuitiveandeasytouse,sopeopledon’tneedonscreenhelpcontenttotellthemhowtousethedeviceortheapps.ThisexperienceleadspeopletoexpectalliOSappstobesimilarlyeasytouse.

MostiOSAppsHaveaSingleWindow

AniOSapplicationhasasinglewindow,unlessitsupportsanexternaldisplay.Anapp’swindowfillsthedevice’smainscreenandprovidesanemptysurfacethathostsoneormoreviewsinwhichyoupresentyourcontent.It’simportanttorealizethatawindowinaniOSappisverydifferentfromawindowinacomputerapplication.Forexample,aniOSwindowhasnovisiblecomponents(suchasatitlebaroraclosebutton)anditcannotbemovedtoanewlocationonthedevicescreen.

It’salsoimportanttorealizethatmostusersareunawareofthewindowsandviewsintheiOSappsthattheyuse.Forthemostpart,usersexperienceaniOSappasacollectionofscreensthroughwhichtheynavigate.Fromthisperspective,ascreengenerallycorrespondstoadistinctvisualstateormodeinanapp.IntheContactsapponiPhone,forexample,usersthinkoftheircontactlist(regardlessofitslength)asonescreenandanindividualcontact’sdetailsasadifferentscreen.

Note BecausethisdocumentfocusesontheuserinterfaceanduserexperienceofiOSapps,it

frequentlyuses“screen”asitisunderstoodbymostusers.Unlessotherwisestated,thisdocument

doesnotuse“screen”tomeanaUIScreenobject(whichisanobjectyoucanusetoaccessamirrored

displayscreen).

TwoTypesofSoftwareRuniniOS

TherearetwotypesofsoftwarethatyoucandevelopforiOS-baseddevices:

●iOSapps