iOS uitextview hint text

Defines two uitextview, one for entering text, one for displaying a hint, and displaying a hint when the input text is empty, or not displaying a message.

        6.3.1 text content hint _contenttextviewtip = [[Uitextview alloc] Initwithframe:cgrectmake (5, width_screen-12-        12, 105)];            if (_contenttextviewtip! = nil) {_contenttextviewtip.text = Post_content_tip;            _contenttextviewtip.font = [Uifont systemfontofsize:16.0];            _contenttextviewtip.userinteractionenabled = NO;            _contenttextview.delegate = self;            _contenttextviewtip.textcolor = [[Uicolor alloc] initwithred:160/255.0 green:160/255.0 blue:160/255.0 alpha:1.0];        [ScrollView Addsubview:_contenttextviewtip];        }//6.3.2 text content text Box _textviewrect = CGRectMake (5, width_screen-12 * 2, 105);            if (_contenttextview! = nil) {_contenttextview = [[Uitextview alloc]initwithframe:_textviewrect];            _contenttextview.backgroundcolor = [Uicolor Clearcolor];            _contenttextview.font = [Uifont systemfontofsize:16.0]; _contenttextview.textcolor = [[Uicolor alloc] initwithred:160/255.0 green:160/255.0 blue:160/255.0 alpha:1.0];            _contenttextview.text = @ "Say something ~";            [_contenttextview Setscrollenabled:yes];            _contenttextview.userinteractionenabled = YES;            _contenttextview.showsverticalscrollindicator = YES;            Cgsize size = Cgsizemake (width_screen-12 * 2, 600.0f);            [_contenttextview setcontentsize:size];            _contenttextview.returnkeytype = Uireturnkeydone;            _contenttextview.keyboardtype = Uikeyboardtypedefault;            _contenttextview.delegate = self;        [ScrollView Addsubview:_contenttextview]; }

#pragma mark _contenttextview delegate/** *  event triggered when text changes */-(void) Textviewdidchange: (Uitextview *) textview{    NSLog (@ "textviewdidchange:%@", textview.text);    if (TextView = = _contenttextview)    {                if ([Textview.text isequaltostring:@ ""])        {            _ Contenttextviewtip.alpha = 1;        }        else        {            _contenttextviewtip.alpha = 0;        }    }}

iOS uitextview hint text