If the input box is overwritten by the keyboard and the keyboard is retained

If the input box is overwritten by the keyboard and the keyboard is retained

 

----------- Content in ViewController. m ------------

# Import "ViewController. h"

# Import "ScreenView. h"

@ Interface ViewController () <UITextFieldDelegate>

{

ScreenView * _ screenV; // overwrite the full screen

UIView * secView;

}

@ End

 

@ Implementation ViewController

 

-(Void) viewDidLoad {

[Super viewDidLoad];

[Self textFieldOnView: self. view]; // Add a subview

[Self coverBtnOnView: self. view]; // Add button

}

-(Void) textFieldOnView :( UIView *) currentV {

UITextField * tF1 = [[UITextField alloc] init];

TF1.frame = CGRectMake (30,100,100, 40 );

TF1.delegate = self;

# Pragma ------ set tF1.tag = 1;

TF1.tag = 1;

TF1.borderStyle = UITextBorderStyleRoundedRect;

[CurrentV addSubview: tF1];

UITextField * tF2 = [[UITextField alloc] init];

TF2.frame = CGRectMake (30,500,100, 40 );

TF2.delegate = self;

TF2.borderStyle = UITextBorderStyleRoundedRect;

[CurrentV addSubview: tF2];

SecView = [[UIView alloc] initWithFrame: CGRectMake (150,200,200,300)];

SecView. backgroundColor = [UIColor yellowColor];

[CurrentV addSubview: secView];

UITextField * textF1 = [[UITextField alloc] init];

TextF1.frame = CGRectMake (30,100,100, 40 );

TextF1.delegate = self;

TextF1.borderStyle = UITextBorderStyleRoundedRect;

[SecView addSubview: textF1];

UITextField * textF2 = [[UITextField alloc] init];

TextF2.frame = CGRectMake (30,250,100, 40 );

TextF2.delegate = self;

TextF2.borderStyle = UITextBorderStyleRoundedRect;

[SecView addSubview: textF2];

}

 

-(Void) coverBtnOnView :( UIView *) currentV {

UIButton * coverBtn = [UIButton buttonWithType: UIButtonTypeSystem];

CoverBtn. backgroundColor = [UIColor cyanColor];

If (! _ ScreenV ){

[CoverBtn setTitle: @ "cover full screen" forState: UIControlStateNormal];

[CoverBtn addTarget: self action: @ selector (coverScreen) forControlEvents: UIControlEventTouchUpInside];

} Else {

[CoverBtn setTitle: @ "return" forState: UIControlStateNormal];

[CoverBtn addTarget: self action: @ selector (removeCoverScreen) forControlEvents: UIControlEventTouchUpInside];

}

UIView * v = [self. view viewWithTag: 1];

CoverBtn. frame = v. frame;

CGRect temp = coverBtn. frame;

Temp. origin. x + = temp. size. width;

CoverBtn. frame = temp;

[CurrentV addSubview: coverBtn];

}

 

-(Void) removeCoverScreen {

[_ ScreenV removeFromSuperview];

}

 

-(Void) coverScreen {

_ ScreenV = [[ScreenView alloc] initWithFrame: [UIScreen mainScreen]. bounds];

# Pragma ----- view transparency

_ ScreenV. backgroundColor = [[UIColor brownColor] colorWithAlphaComponent: 0.5];

# Pragma ----- view and its subview transparency

// ScreenV. alpha = 0.7;

# Pragma ----- create a view to overwrite the full screen. You need to create a ScreenView class and override the touchesBegan method.

[[UIApplication sharedApplication]. keyWindow addSubview: _ screenV];

# Pragma ----- if self. view is full screen size, the following sentence is feasible. _ screenV is initialized directly with UIView and can respond to touch events.

// [Self. view addSubview: _ screenV];

[Self textFieldOnView: _ screenV]; // Add textField

[Self coverBtnOnView: _ screenV];

}

 

// When you start to edit the input box, the keyboard appears. Execute this event.

-(Void) textFieldDidBeginEditing :( UITextField *) textField

{

UIView * tempView = self. view;

If (_ screenV ){

TempView = _ screenV;

}

UIWindow * window = [[UIApplication sharedApplication] delegate] window];

CGRect rect = [textField convertRect: textField. bounds toView: window]; // convert the coordinates of textField to those of its parent view.

NSInteger y = rect. origin. y + textField. frame. size. height;

NSInteger offset = (y-(tempView. frame. size. height-256.0); // The keyboard height is 216. // how do I obtain the keyboard height?

NSTimeInterval animationDuration = 0.30f;

[UIView beginAnimations: @ "ResizeForKeyboard" context: nil];

[UIView setAnimationDuration: animationDuration];

// Move the Y coordinate of the view to the offset Unit so that the following space is used for the display of the soft keyboard.

If (offset> 0)

TempView. frame = CGRectMake (0.0f,-offset, tempView. frame. size. width, tempView. frame. size. height );

[UIView commitAnimations];

}

 

/// When the user presses the return key or the return key, the keyboard disappears.

//-(BOOL) textFieldShouldReturn :( UITextField *) textField

//{

// [TextField resignFirstResponder];

// Return YES;

//}

 

-(Void) touchesBegan :( NSSet <UITouch *> *) touches withEvent :( UIEvent *) event {

[Super touchesBegan: touches withEvent: event];

[Self. view endEditing: YES];

}

 

// After the input box is edited, the view is restored to the original state.

-(Void) textFieldDidEndEditing :( UITextField *) textField

{

UIView * tempView = self. view;

If (_ screenV ){

TempView = _ screenV;

}

TempView. frame = CGRectMake (0, 0, tempView. frame. size. width, tempView. frame. size. height );

}

-(Void) didReceiveMemoryWarning {

[Super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

 

----------------- Content in ScreenView. m -----------------

# Import "ScreenView. h"

 

@ Implementation ScreenView

 

-(Void) touchesBegan :( NSSet <UITouch *> *) touches withEvent :( UIEvent *) event {

[Super touchesBegan: touches withEvent: event];

[Self endEditing: YES];

}

@ End

 

Please correct us for any omissions.

END