我的iPhone有iOS8。我想在UIKeyboardTypeNumberPad上添加DONE按钮。 DONE显示在左侧空按钮上。但是当我触摸（按）DONE时，不会调用选择器方法doneButtonClicked。我的代码如下。代码有什么问题？
- (void)viewWillAppear:(BOOL)animtated {
// Register the observer for the keyboardWillShow event
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardDidShowNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animtated {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)keyboardWillShow:(NSNotification *)notification {
// create custom button
if (!self.doneButton)
{
self.doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
[self.doneButton addTarget:self action:@selector(doneButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
}
self.doneButton.adjustsImageWhenHighlighted = NO;
[self.doneButton setTitle:@"DONE" forState:UIControlStateNormal];
[self.doneButton.titleLabel setFont:[UIFont systemFontOfSize:16.0]];
[self.doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[self.doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];
// locate keyboard view
if ([[[UIApplication sharedApplication] windows] count] <= 1) return;
UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
UIView* keyboard;
for(int i=0; i<[tempWindow.subviews count]; i++)
{
keyboard = [tempWindow.subviews objectAtIndex:i];
// keyboard found, add the button
if ([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES)
{
BOOL isPortrait = UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation);
self.doneButton.frame = CGRectMake(((isPortrait)?0:-1),((int) (keyboard.frame.size.height*3)/4) + ((isPortrait)?0:1),(int) keyboard.frame.size.width/3-1, (isPortrait)?60:40);
[keyboard addSubview:self.doneButton];
}
//This code will work on iOS 8.0
else if([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)
{
for(int i = 0 ; i < [keyboard.subviews count] ; i++)
{
UIView* hostkeyboard = [keyboard.subviews objectAtIndex:i];
if([[hostkeyboard description] hasPrefix:@"<UIInputSetHost"] == YES)
{
BOOL isPortrait = UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation);
self.doneButton.frame = CGRectMake(((isPortrait) ? 0 : -1),((int) (hostkeyboard.frame.size.height*3)/4) + ((isPortrait) ? 0 : 1),(int) hostkeyboard.frame.size.width/3-1, (isPortrait) ? 60 : 40);
[hostkeyboard addSubview:self.doneButton];
}
}
}
else{}
}
}
- (void)doneButtonClicked:(id)sender{
[self.heightUpdateTextField resignFirstResponder];
}
答案 0 :(得分：0)
试一试。这种方法适用于iOS 6,7＆amp; 8：
- (void)keyboardWillShow:(NSNotification *)iNotification
// If there's no keyboard yet, don't do anything
if ([[[UIApplication sharedApplication] windows] count] < 2) {
return;
}
UIWindow *keyboardWindow = [[UIApplication sharedApplication] windows][1];
// Create new dismiss keyboard button
UIButton *aDismissKeyboardButton = [UIButton buttonWithType:UIButtonTypeCustom];
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.3")) {
aDismissKeyboardButton.frame = CGRectMake(0, [[UIScreen mainScreen] bounds].size.height - 53, [[UIScreen mainScreen] bounds].size.width / 3, 53);
} else {
aDismissKeyboardButton.frame = CGRectMake(0, 163, 106, 53);
}
aDismissKeyboardButton.adjustsImageWhenHighlighted = FALSE;
[aDismissKeyboardButton setExclusiveTouch:YES];
UIImage *aDismissKeyboardButtonImageNormal;
UIImage *aDismissKeyboardButtonImageHighlighted;
aDismissKeyboardButtonImageNormal = [UIImage imageNamed:@"myImage.png"];
aDismissKeyboardButtonImageHighlighted = [UIImage imageNamed:@"myImageHighLighted.png"];
[aDismissKeyboardButton setImage:aDismissKeyboardButtonImageNormal forState:UIControlStateNormal];
[aDismissKeyboardButton setImage:aDismissKeyboardButtonImageHighlighted forState:UIControlStateHighlighted];
SEL aDoneButtonSelector = NSSelectorFromString(@"doneButtonPressed");
[aDismissKeyboardButton addTarget:iDelegate action:aDoneButtonSelector forControlEvents:UIControlEventTouchUpInside];
// Locate keyboard view and add button
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.3")) {
for (UIWindow *window in [[UIApplication sharedApplication] windows]) {
if ([[window description] hasPrefix:@"<UITextEffectsWindow"]) {
[window addSubview:aDismissKeyboardButton];
return;
}
}
} else if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0")) {
for (UIView *aSubview in [[keyboardWindow.subviews objectAtIndex:0] subviews]) {
if ([[aSubview description] hasPrefix:@"<UIInputSetHost"]) {
[aSubview addSubview:aDismissKeyboardButton];
return;
}
}
} else {
NSString *keyboardPrefix = SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"6.0") ? @"<UIPeripheralHost" : @"<UIKeyboard";
for (UIView *aSubView in keyboardWindow.subviews) {
if ([[aSubView description] hasPrefix:keyboardPrefix]) {
[aSubView addSubview:aDismissKeyboardButton];
return;
}
}
}
}
在这里，我已经定义了一个宏来检查系统版本，如下所示：
#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
答案 1 :(得分：0)
sorry for bad english。
我之前复制了你的代码来检查，错误是什么，经过一些改变它的工作正常但是Frame of done Button是不同的，你可以根据你的愿望改变，让我们检查编辑的代码..
- (void)viewWillAppear:(BOOL)animtated {
// Register the observer for the keyboardWillShow event
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyboardWillShow:) name:UIKeyboardDidShowNotification object:nil];
}
- (void)viewWillDisappear:(BOOL)animtated {
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)keyboardWillShow:(NSNotification *)notification {
// create custom button
UIButton *doneButton = [UIButton buttonWithType:UIButtonTypeCustom];
[doneButton addTarget:self action:@selector(doneButtonClicked:) forControlEvents:UIControlEventTouchUpInside];
doneButton.adjustsImageWhenHighlighted = NO;
[doneButton setTitle:@"DONE" forState:UIControlStateNormal];
[doneButton.titleLabel setFont:[UIFont systemFontOfSize:16.0]];
[doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[doneButton setTitleColor:[UIColor blackColor] forState:UIControlStateHighlighted];
// locate keyboard view
if ([[[UIApplication sharedApplication] windows] count] <= 1) return;
UIWindow* tempWindow = [[[UIApplication sharedApplication] windows] objectAtIndex:1];
UIView* keyboard;
for(int i=0; i<[tempWindow.subviews count]; i++)
{
keyboard = [tempWindow.subviews objectAtIndex:i];
// keyboard found, add the button
if ([[keyboard description] hasPrefix:@"<UIPeripheralHost"] == YES)
{
BOOL isPortrait = UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation);
doneButton.frame = CGRectMake(((isPortrait)?0:-1),((int) (keyboard.frame.size.height*3)/4) + ((isPortrait)?0:1),(int) keyboard.frame.size.width/3-1, (isPortrait)?60:40);
[keyboard addSubview:doneButton];
}
//This code will work on iOS 8.0
else if([[keyboard description] hasPrefix:@"<UIInputSetContainerView"] == YES)
{
for(int i = 0 ; i < [keyboard.subviews count] ; i++)
{
UIView* hostkeyboard = [keyboard.subviews objectAtIndex:i];
if([[hostkeyboard description] hasPrefix:@"<UIInputSetHost"] == YES)
{
BOOL isPortrait = UIInterfaceOrientationIsPortrait([UIApplication sharedApplication].statusBarOrientation);
doneButton.frame = CGRectMake(((isPortrait) ? 0 : -1),((int) (hostkeyboard.frame.size.height*3)/4) + ((isPortrait) ? 0 : 1),(int) hostkeyboard.frame.size.width/3-1, (isPortrait) ? 60 : 40);
[hostkeyboard addSubview:doneButton];
}
}
}
else{}
}
}
- (void)doneButtonClicked:(id)sender{
[self->cityTxt resignFirstResponder]; //cityTxt is my textfield
}
它对我的工作，希望它也适合你。