问题
I am working on custom keyboard. all works perfect but when i rotate the keyboard to landscape mode the keyboard load correctly but it takes the height of portrait mode keyboardview.
Here is my Try:
@interface KeyboardViewController ()
{
CGFloat expandedHeight ;
BOOL isPortrait;
}
@property(strong,nonatomic)keyboardLayout *ObjKeyLayout;
- (void)updateViewConstraints {
[super updateViewConstraints];
[self updateCustomHeight];
}
-(void)updateCustomHeight
{
if (self.heightConstraint != nil) {
[self.view removeConstraint:self.heightConstraint];
[self.view layoutIfNeeded];
}
if(isPortrait)
{
expandedHeight = 258;
}
else
{
expandedHeight = 156;
}
self.heightConstraint = [NSLayoutConstraint constraintWithItem:self.view attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:0.0 constant: expandedHeight];
[self.view addConstraint:self.heightConstraint];
[self.view layoutIfNeeded];
}
- (void)deviceOrientationDidChange:(NSNotification *)notification
{
NSLog(@"key");
if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height){
//Keyboard is in Portrait
isPortrait=YES;
isp=YES;
[self LoadKeyboardview];
[self updateCustomHeight];
}
else{
isPortrait=NO;
[self LoadKeyboardview];
[self updateCustomHeight];
//Keyboard is in Landscape
}
-(void)initiateOrientation
{
CGSize screenSize = [[UIScreen mainScreen] bounds].size;
if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height){
//Keyboard is in Portrait
isPortrait=YES;
[self LoadKeyboardview];
}
else{
isPortrait=NO;
[self LoadKeyboardview];
//Keyboard is in Landscape
}
- (void)viewWillTransitionToSize:(CGSize)size withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator
{
if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height){
//Keyboard is in Portrait
isPortrait=YES;
[self LoadKeyboardview];
[self updateCustomHeight];
}
else{
isPortrait=NO;
[self LoadKeyboardview];
[self updateCustomHeight];
//Keyboard is in Landscape
}
}
-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height){
//Keyboard is in Portrait
isPortrait=YES;
[self LoadKeyboardview];
[self updateCustomHeight];
}
else{
isPortrait=NO;
[self LoadKeyboardview];
[self updateCustomHeight];
}
}
- (NSLayoutConstraint*)findViewHeightConstraint {
NSArray *constraints = self.view.superview.constraints;
for ( NSLayoutConstraint *constraint in constraints ) {
if ( constraint.firstItem == self.view
&& constraint.firstAttribute == NSLayoutAttributeHeight )
return constraint;
}
[self updateCustomHeight];
return nil;
}
- (void)viewWillLayoutSubviews {
[super viewWillLayoutSubviews];
// Update height when rotating
[self updateCustomHeight];
}
EDIT : Portrait Mode
EDIT:-
@implementation KeyboardViewController
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Perform custom initialization work here
self.portraitHeight = 256;
self.landscapeHeight = 162;
}
return self;
}
- (void)viewDidLoad {
[super viewDidLoad];
// [[UIDevice currentDevice] beginGeneratingDeviceOrientationNotifications];
[[NSNotificationCenter defaultCenter] addObserver: self selector: @selector(deviceOrientationDidChange:) name: UIDeviceOrientationDidChangeNotification object: nil];
[self copyDatabaseIfNeeded];
NumKey=[[NSArray alloc]initWithObjects:@"1", @"2", @"3", @"4", @"5", @"6", @"7", @"8", @"9", @"0", @"-", @"/", @":", @";", @"(", @")", @"$", @"&", @"@", @"\"", @".", @",", @"?", @"!",@"'",@"^", nil];
arrAlphabet=[[NSArray alloc]initWithObjects:@"q", @"w", @"e", @"r", @"t", @"y", @"u", @"i", @"o", @"p", @"a", @"s", @"d", @"f", @"g", @"h", @"j", @"k", @"l", @"z", @"x", @"c", @"v", @"b",@"n",@"m", nil];
arrKeyImages=[[NSArray alloc]initWithObjects:@"Q_key.png", @"W_key.png", @"E_key.png", @"R_key.png", @"T_key.png", @"Y_key.png", @"U_key.png", @"I_key.png", @"O_key.png", @"P_key.png", @"A_key.png", @"S_key.png", @"D_key.png", @"F_key.png", @"G_key.png", @"H_key.png", @"J_key.png", @"K_key.png", @"L_key.png", @"Z_key.png", @"X_key.png", @"C_key.png", @"V_key.png", @"B_key.png",@"N_key.png",@"M_key.png", nil];
keyIpad=[[NSArray alloc]initWithObjects:@"Q_Land_key.png", @"W_Land_key.png", @"E_Land_key.png", @"R_Land_key.png", @"T_Land_key.png", @"Y_Land_key.png", @"U_Land_key.png", @"I_Land_key.png", @"O_Land_key.png", @"P_Land_key.png", @"A_Land_key.png", @"S_Land_key.png", @"D_Land_key.png", @"F_Land_key.png", @"G_Land_key.png", @"H_Land_key.png", @"J_Land_key.png", @"K_Land_key.png", @"L_Land_key.png", @"Z_Land_key.png", @"X_Land_key.png", @"C_Land_key.png", @"V_Land_key.png", @"B_Land_key.png",@"N_Land_key.png",@"M_Land_key.png", nil];
arrspecialImageKey=[[NSArray alloc]initWithObjects:@"1_key.png", @"2_key.png", @"3_key.png", @"4_key.png", @"5_key.png", @"6_key.png", @"7_key.png", @"8_key.png", @"9_key.png", @"0_key.png", @"desh_key.png", @"slash.png", @"shift_shemi.png", @"semi.png", @"left_brecket.png", @"right_breacket.png", @"doller_key.png", @"and_key.png", @"AtTherate.png", @"dobleComma.png", @"dot.png",@"singel_comma.png",@"question_mark.png", @"exemlaration.png", @"single_uppar_comma.png",@"upparArrow.png", nil];
arrSpecialIpad=[[NSArray alloc]initWithObjects:@"1_Land_key.png", @"2_Land_key.png", @"3_Land_key.png", @"4_Land_key.png", @"5_Land_key.png", @"6_Land_key.png", @"7_Land_key.png", @"8_Land_key.png", @"9_Land_key.png", @"0_Land_key.png", @"Dash_Land_key.png", @"slash_Land_key.png", @"shif_semi_Land_key", @"semi_Land_key", @"left_brecket_Land_key.png", @"right_Land_key.png", @"doller_Land_key.png", @"and_Land_key.png", @"attherate_Land_key.png", @"dobblecomma_Land_key", @"dot_Land_key.png",@"comma.png",@"question.png", @"exemeleter.png", @"uppar_comma.png",@"upArrow.png", nil];
self.nextKeyboardButton = [UIButton buttonWithType:UIButtonTypeSystem];
[self.nextKeyboardButton setTitle:NSLocalizedString(@"Next Keyboard", @"Title for 'Next Keyboard' button") forState:UIControlStateNormal];
[self.nextKeyboardButton sizeToFit];
self.nextKeyboardButton.translatesAutoresizingMaskIntoConstraints = NO;
[self.nextKeyboardButton addTarget:self action:@selector(advanceToNextInputMode) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:self.nextKeyboardButton];
self.nextKeyboardButton.hidden=YES;
NSLayoutConstraint *nextKeyboardButtonLeftSideConstraint = [NSLayoutConstraint constraintWithItem:self.nextKeyboardButton attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0.0];
NSLayoutConstraint *nextKeyboardButtonBottomConstraint = [NSLayoutConstraint constraintWithItem:self.nextKeyboardButton attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0];
[self.view addConstraints:@[nextKeyboardButtonLeftSideConstraint, nextKeyboardButtonBottomConstraint]];
self.heightConstraint = [NSLayoutConstraint constraintWithItem:self.view attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:0.0 constant:self.portraitHeight];
// Perform custom UI setup here
}
- (void)deviceOrientationDidChange:(NSNotification *)notification
{
self.heightConstraint.constant=expandedHeight;
NSLog(@"key");
if([UIScreen mainScreen].bounds.size.width < [UIScreen mainScreen].bounds.size.height){
//Keyboard is in Portrait
isPortrait=YES;
isp=YES;
[self LoadKeyboardview];
[self updateCustomHeight];
}
else{
isPortrait=NO;
[self LoadKeyboardview];
[self updateCustomHeight];
}
- (NSLayoutConstraint*)findViewHeightConstraint {
NSArray *constraints = self.view.superview.constraints;
for ( NSLayoutConstraint *constraint in constraints ) {
if ( constraint.firstItem == self.view
&& constraint.firstAttribute == NSLayoutAttributeHeight )
return constraint;
}
// [self updateCustomHeight];
return nil;
}
回答1:
You would be better to not keep removing and adding the height constraint. Instead add it the first time and then after that simply change its value and set the view as needing layout and then do the layout.
Also think your might be working out the orientation wrong by using bounds before the transition occurs.
Updated your methods as follows:
- (void)viewWillTransitionToSize:(CGSize)size
withTransitionCoordinator:(id<UIViewControllerTransitionCoordinator>)coordinator{
if (size.width < size.height){
//Keyboard is in Portrait
isPortrait=YES;
[self LoadKeyboardview];
[self updateCustomHeight];
}
else{
// New orientation is landscape
isPortrait=NO;
[self LoadKeyboardview];
[self updateCustomHeight];
}
}
-(void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation
duration:(NSTimeInterval)duration{
if (toInterfaceOrientation == UIInterfaceOrientationPortrait ||
toInterfaceOrientation == UIInterfaceOrientationPortraitUpsideDown){
//Keyboard will be Portrait
isPortrait=YES;
[self LoadKeyboardview];
[self updateCustomHeight];
}
else{
//Keyboard will be Landscape
isPortrait=NO;
[self LoadKeyboardview];
[self updateCustomHeight];
}
}
-(void)updateCustomHeight
{
if(isPortrait){
expandedHeight = 258;
}
else{
expandedHeight = 156;
}
// If no constraint add one, or if one exists update it only
// if the height needs to change.
if (self.heightConstraint == nil) {
self.heightConstraint =
[NSLayoutConstraint constraintWithItem:self.view
attribute:NSLayoutAttributeHeight
relatedBy:NSLayoutRelationEqual toItem:nil
attribute:NSLayoutAttributeNotAnAttribute
multiplier:0.0
constant:expandedHeight];
[self.view addConstraint:self.heightConstraint];
[self.view setNeedsLayout];
[self.view layoutIfNeeded];
}
else if (self.heightConstraint.constant != expandedHeight){
self.heightConstraint.constant = expandedHeight;
[self.view setNeedsLayout];
[self.view layoutIfNeeded];
}
}
回答2:
If you use "auto layout" in designing of keyboard in xib then there is no need to add height constraint,it automatically adjust according to default keyboard size.I simply load the view and not add any height constraint and i works fine for me in all devices.
override func viewDidLoad() {
super.viewDidLoad()
let nib = UINib(nibName: "VSPKeyboardViewController", bundle: nil)
let objects = nib.instantiateWithOwner(self, options: nil)
view = objects[0] as! UIView
}
override func updateViewConstraints() {
super.updateViewConstraints()
}
来源：https://stackoverflow.com/questions/31872331/ios-customkeyboard-getting-wrong-size-in-landscape-mode