iOS Foundation-uitextfield

Uitextfield commonly used for external text input, is a common input box. The following code details the various properties and methods of Uitextfield

-(void) viewdidload{    [Super viewdidload];   //Text input box uitextfield    Uitextfield * TextField = [[Uitextfield alloc] init];   //settings     Textfield.frame = CGRectMake ((a); &nbs p;      //Set the text in the input box to default to null     Textfield.text = nil;   //Set the property string in the input box, default is NULL if the property is not understood String, can skip     Textfield.attributedtext = nil;   //Set default property string     Textfield.defaulttextattributes = nil;   //Set the default displayed property string     Textfield.attributedplaceholder = nil;    //Set the text color of the input box, default is blank, not set because the system is set to black     Textfield.textcolor = [Uicolor blackcolor];   // Set the background color     Textfield.backgroundcolor = [Uicolor greencolor];   //Set the font of the input box, default is empty, not set, system default setting 12pt     Textfield.font = [Uifont systemfontofsize:18.0];   //Set background image   Valid only if the frame type is set to Uitextborderstylenone    //textfield.background = [UIImage imagenamed:@ "1.png"];&nbsP  //textfield.disabledbackground = [UIImage imagenamed:@ "2.png"];       //Set input box to Password box   Every character you enter becomes a point     textfield.securetextentry = no;   /*     typedef ns_enum ( Nsinteger, nstextalignment)      {     nstextalignmentleft      = 0,  & nbsp   //Align Left      #if   iphone     nstextalignmentcenter    = 1,    Center      nstextalignmentright     = 2,   //Right align      #else   ipad& nbsp;    nstextalignmentright     = 1,   //Visually right aligned     Nstex talignmentcenter    = 2,   //visually centered     #endif   other    &nbsp ; nstextalignmentjustified = 3,   //and paragraph alignment      nstextalignmentnatural   = 4,   // Default status   Normal    &nbsp } ns_enum_available_ios (6_0);     */   //Set the text display mode of the input box     Textfield.textalignment = nstextalignmentnatural;   //Set text displayed by default 70% transparency     Textfield.placeholder = @ "Please enter text";   /*& nbsp;    typedef ns_enum (Nsinteger, Uitextborderstyle) {     Uitextborderstylenone,   & nbsp  /No Border      Uitextborderstyleline,      //square Rectangle solid line      uitextborderstylebezel,     /square Rectangle solid line      uitextborderstyleroundedrect//rounded rectangle with transparent lines & nbsp;   };*/   /Set Frame type     Textfield.borderstyle = uitextborderstylenone;   & nbsp;   //Set input box font minimum     textfield.minimumfontsize = 18.0;       // When set to Yes, the text automatically shrinks to fit the text window size, and the default is to keep the original size, while the long text scrolls     Textfield.adjustsfontsizetofitwidth = no;   /*      Ypedef ns_enum (Nsinteger, uikeyboardtype) {&NBsp;    uikeyboardtypedefault,               //default status, all characters are supported      Uikeyboardtypeasciicapable,          //Can input ASCII code      Uikeyboardtypenum bersandpunctuation, //Digital and punctuation      uikeyboardtypeurl,            & nbsp      //letters and URLs (COM)      uikeyboardtypenumberpad,            & nbsp Digital keypad      Uikeyboardtypephonepad,              //digital with +*# telephone keypad  &N Bsp   Uikeyboardtypenamephonepad,          //telephone keypad support input person name      Uikeyboardtypeemailaddress,          //Alphabet with @. Enter email      Uikeyboardtypedecimalpad Ns_enum_available_ios (4_1),  //numeric keypad with .     Uikeyboardtypetwitter Ns_enum_available_ios (5_0),     //letter with @#     Uikeyboardtypewebsearch Ns_enum_available_ios (7_0),   //Letter Belt   Go button      Uikeyboardtypealphabet = uikeyboardtypeasciicapable,//You can enter ASCII First capital letters          };      */   //Set keyboard style     Textfield.keyboardtype = uikeyboardtypeurl;   // When you edit the input box again, the contents of the input box are emptied     textfield.clearsonbeginediting = no;       //Whether the first letter is capitalized    /*     typedef ns_enum (Nsinteger, Uitextautocapitalizationtype) {     uitextautocapitalizationtypenone,         //all lowercase      Uitextautocapitalizationtypewords,        //capitalize the first letter of each word (with spaces in the middle)      Uitextautocapitalizationtypesentences,    //initial capitalization of the first word      Uitextautocapitalizationtypeallcharacters,//ALL caps     };     */    Textfield.autocapitalizationtype = Uitextautocapitalizationtypenone;       /*     The input box has a fork number, when it is displayed, used to delete the inside of the input box once           typedef ns_enum (Nsinteger, Uitextfieldviewmode) {     Uitextfieldviewmodenever,        //default display no      uitextfieldviewmodewhileediting,  //input with cross number      uitextfieldviewmodeunlessediting,//no cross when input      Uitextfieldviewmodealways        //Always show forks,    };     */    Textfield.clearbuttonmode = uitextfieldviewmodewhileediting;       /*   & nbsp typedef enum {     Uitextautocorrectiontypedefault, default      Uitextautocorrectiontypeno, & nbsp No automatic error correction      uitextautocorrectiontypeyes,  automatic error correction     } Uitextautocorrectiontype;      */   //Whether error correction     Textfield.autocorrectiontype = Uitextautocorrectiontypeno;       /*     typedef ns_enum (Nsinteger, Uireturnkeytype) {     Uireturnkeydefault,      //return key display default status return     uireturnkeygo,           //return key display go     Uireturnkeygoogle,        //return key display search     uireturnkeyjoin,         //ret Urn Key display join      uireturnkeynext,         //return key show next Next    & nbsp Uireturnkeyroute,        //return key display route     uireturnkeysearch,       //return key display search      uireturnkeysend,         //return key display send Send      Uireturnkeyyahoo,        //return key display search     uireturnkeydone,         //return built done   &nbsp uireturnkeyemergencycall,    };     */   //Set the return key type     Textfield.returnkeytype = uireturnkeydefault;       /*     typedef ns_enum ( Nsinteger, uikeyboardappearance) {     uikeyboardappearancedefault,         //  Default appearance light grey      uikeyboardappearancedark             //dark grey graphite      Uikeyboardappearancelight            //light gray      Uikeyboardappearance Alert = uikeyboardappearancedark, //dark grey graphite     };     */   //Set the appearance of the keyboard &nbsp ;   Textfield.keyboardappearance = uikeyboardappearancedefault;       //Set the view of the position between input text     Uiimageview *image = [[Uiimageview alloc] initwithimage:[uiimage imagenamed:@ "1"]];    Image.bounds = CGRectMake (0, 0, ten, ten);    TEXtfield.leftview = image;   //display status and cross-sign display status similar to     Textfield.leftviewmode = Uitextfieldviewmodealways ;   //Set view    Uiimageview *image1 = [[Uiimageview alloc] Initwithimage:[uiimage of the right position inside the input box imagenamed:@ "2"]];    image1.bounds = CGRectMake (0, 0, ten);    Textfield.rightview = image1;&nbsp ;  //Display status and cross-sign display status similar to     Textfield.rightviewmode = uitextfieldviewmodealways;      & nbsp Textfield.delegate = self;        [Self.view Addsubview:textfield];} /* Override drawing of various methods   //override to reset the Edge area  -(CGRect) Borderrectforbounds: (cgrect) bounds;  //rewrite to reset the text area  -(CGRect) Textrectforbounds: (cgrect) bounds;  //rewrite to reset the placeholder area is also the default display area  -(cgrect) Placeholderrectforbounds: (cgrect) bounds;  //rewrite to reset the editing area  -(CGRect) Editingrectforbounds: (CGRect) bounds;  //rewrite to reset the Clearbutton position, changing the size may cause the picture of the button to distort  -(CGRect) Clearbuttonrectforbounds: (CGRect) Bounds;  //rewrite to reset the left view area  -(CGRect) Leftviewrectforbounds: (CGRect) bounds;  // Rewrite to reset the right view area  -(CGRect) Rightviewrectforbounds: (cgrect) bounds;  //rewrite paint to change text properties, When overriding call super can be drawn by default graphics properties, if you completely override the drawing function, you do not have to call super -(void) Drawtextinrect: (cgrect) rect;  //override draw Change placeholder properties , the call to super When overridden can be drawn by default drawing properties, and if you completely override the drawing function, you do not have to call super -(void) Drawplaceholderinrect: (cgrect) rect; */#pragma mark-uitextfielddelegate//Set the input box, whether it can be modified/no will not be modified, no keyboard//Yes can be modified, the default value-(BOOL) Textfieldshouldbeginediting: ( Uitextfield *) textfield{    return YES; When you start editing with focus, the method is executed-(void) textfielddidbeginediting: (Uitextfield *) textfield{}/*  returns a bool value that specifies whether the text field is allowed to touch, and when the edit is finished, The text field will yield first responder  to prevent the text field from disappearing when the user finishes editing, you can return no  this is useful for programs where text fields must always be active, such as if the message  */-(BOOL) Textfieldshouldendediting: (Uitextfield *) textfield{    return NO;} When the text box finishes editing, it calls-(void) textfielddidendediting: (Uitextfield *) textfield{}/*  when the user uses the AutoCorrect feature to modify the input text to the recommended text, This method is called   This is for applications that want to add the Undo optionOrder is particularly useful   can track the last modification made in a field, or log records of all edits, used for auditing purposes   to prevent the text from being changed can return no  the method's parameters in another Nsrange object, indicating the position of the changed text, The proposed modified text is also  */-(BOOL) TextField: (Uitextfield *) TextField Shouldchangecharactersinrange: (nsrange) Range Replacementstring: (NSString *) string{    return YES;} Returns a BOOL value indicating whether to allow content to be purged based on user request//can be set under certain conditions to allow purging of content-(BOOL) Textfieldshouldclear: (Uitextfield *) textfield{    return YES;} Returns a BOOL value that indicates whether the edit is allowed to end when the ENTER key is pressed//if allowing the Resignfirstresponder method to be called will result in the end of the edit, and the keyboard will be lucky-(BOOL) Textfieldshouldreturn: ( Uitextfield *) textfield{    return YES;

iOS Foundation-uitextfield