Uitextfield limits the input length, and uitextview limits the input length.

---------------- Uitextfield limits the input length ------------

.

Class to inherit uitextfielddelegate.

.

Uitextfield * content = [uitextfield
Alloc] initwithframe:
Cgrectmake (X, Y, width, height)];

Content. textcolor = [uicolor
Graycolor];

Content. font = [uifont
Systemfontofsize: 17];

Content. Delegate =
Self; // specify your delegate

.

# Pragma mark-

# Pragma mark uitextfielddelegate

-(Bool) textfield :( uitextfield *) textfield shouldchangecharactersinrange :( nsange) range replacementstring :( nsstring
*) String

{

If (range. Location>
20)

{

Uialertview * alertview = [uialertview
Alloc] initwithtitle: Nil
Message: @ "length cannot exceed 20"
Delegate: Nil
Cancelbuttontitle: @ "close"
Otherbuttontitles: Nil];

[Alertview
Show];

[Alertview
Release];

Return
No;

}

Return yes;

}

---------------- Uitextview limits the input length ------------

.

<Uitextviewdelegate>

.

Inputtextview. Delegate = self;
// Specify the delegate

.

# Pragma mark-

# Pragma mark textview

-(Bool) textview :( uitextview *) textview shouldchangetextinrange :( nsange) range replacementtext :( nsstring *) text {

If ([text length] = 0 ){

Return yes;

}

If ([textview. Text length] + range. length> = 140 ){

Return no;

}

Return yes;

}

-(Void) textviewdidchange :( uitextview *) textview {

// [Nsstring stringwithformat: @ "% d", 140-[textview. Text length];
// The length that can be entered.

}