iOS text box Basic use, and the role of all proxy methods

/*

Uitextfield Text Input Box

*/

Uitextfield * TextField = [[Uitextfield alloc]initwithframe:cgrectmake (50, 50, 275, 50)];

Set Border form

/*

Uitextborderstyleroundedrect fillet Form

Uitextborderstyleline Line Form

Uitextborderstylebezel Groove Form

*/

Textfield.borderstyle = Uitextborderstyleroundedrect;

Typically used to look for text displayed in the current text input box

Textfield.text = @ "";

Text color

Textfield.textcolor = [Uicolor Redcolor];

Set Text font size

Textfield.font = [Uifont systemfontofsize:20];

Set Background color

Textfield.backgroundcolor = [Uicolor Lightgraycolor];

Clear text when you start editing repeatedly

textfield.clearsonbeginediting = YES;

Text hints

Textfield.placeholder = @ "Please enter your region name";

Text ciphertext (dark text) This property is typically used to set the password entry box

Textfield.securetextentry = NO;

Alignment of text input

Textfield.textalignment = Nstextalignmentcenter;

Clear button for text input

/*

Uitextfieldviewmodewhileediting when input

Uitextfieldviewmodealways always

Uitextfieldviewmodeunlessediting not in the input time

*/

Textfield.clearbuttonmode = uitextfieldviewmodewhileediting;

Type of keyboard

Textfield.keyboardtype = Uikeyboardtypedefault;

Retuan key types to customize the keyboard

Textfield.returnkeytype = Uireturnkeyjoin;

Left view

UILabel * label = [[UILabel alloc]initwithframe:cgrectmake (0, 0, 50, 50)];

Label.text = @ "Account";

Label.textalignment = Nstextalignmentcenter;

Textfield.leftview = label;

Textfield.leftviewmode = uitextfieldviewmodewhileediting;

Right view

UIButton * button = [UIButton buttonwithtype:uibuttontyperoundedrect];

[Button settitle:@ "OK" forstate:uicontrolstatenormal];

Button.frame = CGRectMake (0, 0, 50, 50);

[Button addtarget:self action: @selector (ButtonClick:) forcontrolevents:uicontroleventtouchupinside];

Textfield.rightview = button;

Textfield.rightviewmode = Uitextfieldviewmodealways;

[Self.window Addsubview:textfield];

Let the keyboard produce the first response the keyboard will bounce automatically

[TextField Becomefirstresponder];

Pick up the keyboard

/*

1. Click the return key of the keyboard

2. Click button

3. Click the blank space to bounce back to the keyboard

*/

　　

/*

Gesture

*/

UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]initwithtarget:self Action: @selector (Tapclick)];

Self-customizing Method/Gesture Method

-(void) tapclick{

Uitextfield * TextField = (uitextfield*) [Self.window viewwithtag:100];

[TextField Resignfirstresponder];

}

-(void) ButtonClick: (uibutton*) button{

Cancel First Response

Uitextfield * textfiled = (uitextfield*) [Self.window viewwithtag:100];

[Textfiled Resignfirstresponder];

}

All Proxy methods function

Called when the return key is clicked is usually used to retract the keyboard

-(BOOL) Textfieldshouldreturn: (Uitextfield *) textfield{

[TextField Resignfirstresponder];

return yes;//5.1 before setting No to click Invalid

}

Called when the text input box starts typing

-(void) textfielddidbeginediting: (Uitextfield *) textfield{

Eject the keyboard

NSLog (@ "Start input");

}

Called when the text input box finishes typing

-(void) textfielddidendediting: (Uitextfield *) textfield{

Gets the text entered in the current text input box

NSLog (@ "input is:%@", Textfield.text);

Example: Determine if the account writing form is correct if incorrect prompt to fill in the wrong re-enter

NSLog (@ "End input");

}

The method that is called when the content of the text input box changes

-(BOOL) TextField: (Uitextfield *) TextField Shouldchangecharactersinrange: (nsrange) range replacementstring: ( NSString *) string{

/*

NSLog (@ "content:%@", textfield.text);//Get what you entered last time

NSLog (@ "Location:%lu length:%lu", range.location,range.length);//range is the position of the current text, the length is zero

NSLog (@ "==%@==", string);//Get the current input character in real time

*/

Need to get all the text in the current text box in real time

NSString * ResultStr = [Textfield.text stringbyappendingstring:string];

NSLog (@ "%@", resultstr);

You can determine whether the input text is correct in this method

return YES;

}

Know

Allow text input box to enter

-(BOOL) textfieldshouldbeginediting: (Uitextfield *) textfield{

return YES;

}

Allow text input box to end

-(BOOL) textfieldshouldendediting: (Uitextfield *) textfield{

In this method, you can limit whether the keyboard can be retracted by judging the length of the text

return NO;

}

Whether it is allowed to be cleared

-(BOOL) Textfieldshouldclear: (Uitextfield *) textfield{

NSLog (@ "text is cleared");

return YES;

}

iOS text box Basic use, and the role of all proxy methods