iphone - I'm Trying to figure out the timing of the iOS Keyboard -

so here situation of timing. have uilabel want update every time keyboard updates uitextfield. have 2 uitextfields 1 ever first responder don't worry there being 2 have them end purposes. problem timing uilabel updating , uitextfield delegate function

- (bool)textfield:(uitextfield *)textfield shouldchangecharactersinrange:(nsrange)range replacementstring:(nsstring *)string;˚ 

the replacement string doesn't added until yes returned above function. need update labels either after function called or during function. can't seem figure out how work. uilabel 1 character behind. below code in general section.

- (bool)textfield:(uitextfield *)textfield shouldchangecharactersinrange:(nsrange)range replacementstring:(nsstring *)string {     if([self.hiddentextfieldfortimeminutes.text length] == 2 && [self.hiddentextfieldfortime.text length] == 2 && ![string isequaltostring:@""])     {         return no;     }      [self synctextfieldsminutesandhours: string];      // returns default yes;     return yes; }  - (void) setaccessorylabel: (nsstring *) hourstring minutesstring: (nsstring *) minutestring {     timeaccessorylabel.text = [nsstring stringwithformat:@"%@:%@", hourstring, minutestring]; }  - (void) synctextfieldsminutesandhours: (nsstring *) string {     // these textfields     nsmutablestring *hoursstring = [nsmutablestring stringwithformat: @"%@", self.hiddentextfieldfortime.text];     nsmutablestring *minutesstring = [nsmutablestring stringwithformat: @"%@", self.hiddentextfieldfortimeminutes.text];      if([self.hiddentextfieldfortimeminutes.text length] == 2 && ![string isequaltostring: @""])     {         [hoursstring appendstring: [nsstring stringwithformat:@"%c", [minutesstring characteratindex:0]]];         [self.hiddentextfieldfortime settext:[nsstring stringwithformat:@"%@", hoursstring]];         [self.hiddentextfieldfortimeminutes settext: [self.hiddentextfieldfortimeminutes.text substringfromindex:1]];     } else if([self.hiddentextfieldfortimeminutes.text length] == 2 && [string isequaltostring: @""])       {           // hours has nothing in           if([hoursstring length] == 0)           {               return;           } else if([hoursstring length] == 1)             {                 // since timing of add , remove of string done return of delegate append string beginning first return.                 [self.hiddentextfieldfortimeminutes settext: [nsstring stringwithformat:@"%c%@", [self.hiddentextfieldfortime.text characteratindex:0], self.hiddentextfieldfortimeminutes.text]];                 [self.hiddentextfieldfortime settext:@""];              } else if ([hoursstring length] == 2)               {                   // since timing of add , remove of string done return of delegate append string beginning first return.                   [self.hiddentextfieldfortimeminutes settext: [nsstring stringwithformat:@"%c%@", [self.hiddentextfieldfortime.text characteratindex:1], self.hiddentextfieldfortimeminutes.text]];                   [self.hiddentextfieldfortime settext: [nsstring stringwithformat:@"%c", [self.hiddentextfieldfortime.text characteratindex:0]]];               }       }      [self setaccessorylabel: self.hiddentextfieldfortime.text minutesstring:self.hiddentextfieldfortimeminutes.text]; } 

yes. text of textfield in textfield:shouldchangecharactersinrange:replacementstring: still have old value, because gets changed after answered yes question if text should change.

you have 2 options.

create nsstring textfield have after returned yes yourself:

- (bool)textfield:(uitextfield *)textfield shouldchangecharactersinrange:(nsrange)range replacementstring:(nsstring *)string {     if([self.hiddentextfieldfortimeminutes.text length] == 2 && [self.hiddentextfieldfortime.text length] == 2 && ![string isequaltostring:@""])     {         return no;     }      nsstring *realstring = [textfield.text stringbyreplacingcharactersinrange:range withstring:string];     [self synctextfieldsminutesandhours: realstring];      // returns default yes;     return yes; } 

or add ibaction gets called after editing took place:

- (void)viewdidload {     // viewdidload implementation     [textfield addtarget:self action:@selector(textfielddidchange:) forcontrolevents:uicontroleventeditingchanged]; }  - (ibaction)textfielddidchange:(uitextfield *)sender {     [self synctextfieldsminutesandhours: sender.text]; }