Four-Uitextview Usage summary of iOS development series

Initialize the input box and set the position and size uitextview *textview = [[Uitextview alloc] Initwithframe:cgrectmake (10, 10, 300, 180)];// Set Preset text Textview.text = @ "";//Set text font textview.font = [Uifont fontwithname:@ "Arial" size:16.5f];// Set text color Textview.textcolor = [Uicolor colorwithred:51/255.0f green:51/255.0f blue:51/255.0f alpha:1.0f];// Set text box background color textview.backgroundcolor = [Uicolor colorwithred:254/255.0f green:254/255.0f blue:254/255.0f alpha:1.0f];// Set text Alignment textview.textalignment = nstextalignmentleft;//iOS7 This alignment is in the following ways://enum {//Nstextalignmentleft = 0, left-aligned, default//Nstextalignmentcenter = 1, center-aligned//Nstextalignmentright = 2, right-justified//Nstextalignme ntjustified = 3, natural alignment at the last line of a paragraph//nstextalignmentnatural = 4, default alignment//} nstextalignment;//set automatic error correction mode TextView . Autocorrectiontype = uitextautocorrectiontypeno;//Automatic error correction methods are as follows://enum {//Uitextautocorrectiontypedefault, default Uitextautocorrectiontypeno, no automatic error correction//Uitextautocorrectiontypeyes,      Auto error correction//} uitextautocorrectiontype;//set automatic capitalization Textview.autocapitalizationtype = uitextautocapitalizationtypenone;/ /automatic capitalization is available in the following ways://enum {//Uitextautocapitalizationtypenone, not automatically capitalized//Uitextautocapitalizationtyp Ewords, capitalize the first letter of the word//uitextautocapitalizationtypesentences, capitalize the first letter of the sentence//Uitextautocapitalizationty Peallcharacters, all letters Uppercase//} uitextautocapitalizationtype;//set the keyboard style Textview.keyboardtype = uikeyboardtypedefault;//           There are several keyboard styles://enum {//Uikeyboardtypedefault, default keyboard, support for all characters//uikeyboardtypeasciicapable,                    ASCII-enabled default keyboard//uikeyboardtypenumbersandpunctuation, standard telephone keypad, +*# characters//Uikeyboardtypeurl support,               URL keyboard that supports only URL characters, supports. com buttons//uikeyboardtypenumberpad, numeric keypad//Uikeyboardtypephonepad, Telephone keypad//UIKEYBOARDTYPENAMEPHONEPAD, phone keypad for entering people's names//uikeyboardtypeemailaddress, e-mail Keyboard//UikeyboardtyPedecimalpad, digital keypad with digits and decimal point//Uikeyboardtypetwitter, optimized keypad for easy input @, #字符//Uikeyboardt Ypealphabet = uikeyboardtypeasciicapable,//} uikeyboardtype;//set return key style Textview.returnkeytype = The uireturnkeydefault;//return key has the following styles://enum {//Uireturnkeydefault, default, Gray button, labeled return//Uireturnke YGo, marked with Go Blue button//Uireturnkeygoogle, labeled with Google's blue button for search//Uireturnkeyjoin, marked with Jo In blue button//uireturnkeynext, blue button labeled next//Uireturnkeyroute, blue button labeled route//Uireturn Keysearch, blue button//uireturnkeysend labeled Search, blue button with Send//Uireturnkeyyahoo, marked with Yah OO blue button//Uireturnkeyyahoo, blue button labeled Yahoo//uireturnkeyemergencycall, Emergency call button//} Uireturnkeytype ;//Set Whether you can drag textview.scrollenabled = yes;//Set Proxy textview.delegate = self;//custom text Box Placeholdertip = [[UILabel alloc] Initw Ithframe:cgrectmake (+, +,];tip.te)XT = @ "Your opinion is the greatest motive force for our progress, thank you!" "; tip.font = [Uifont fontwithname:@" Arial "Size:16.5f];tip.backgroundcolor = [Uicolor clearcolor];tip.enabled = NO;// Custom text box word counts count = [[UILabel alloc] Initwithframe:cgrectmake (n, +, +)];count.text = @ "+"; count.textalignment = Nstextalignmentright;count.font = [Uifont fontwithname:@ "Arial" Size:15.0f];count.backgroundcolor = [UIColor clearcolor];count.enabled = no;//display text box and related controls [Self.view Addsubview:feedback]; [Self.view Addsubview:tip]; [Self.view addsubview:count];//Limit input text length-(BOOL) TextView: (Uitextview *) TextView Shouldchangetextinrange: (Nsrange)    Range Replacementtext: (NSString *) text{if (Range.location <) {return YES;    } else {return NO; }}//Custom text box placeholder-(void) Textviewdidchange: (Uitextview *) textview{count.text = [NSString stringwithformat:@ "%d"    , 240-feedback.text.length]; if (TextView.text.length = = 0) {Tip.text = @ "Your opinion is the greatest motive force of our progress, thank you!"    ";    } else {tip.text = @ ""; }}