我使用 setInputAccessoryView
在键盘顶部添加了一个带有按钮的视图。现在我想要的功能,例如当我从视图中单击按钮时,我想在键盘顶部显示一个选择器视图。意味着像添加选择器视图作为键盘的子视图。
我该怎么做?
在键盘顶部创建所需的视图。您可以从 xib 或手动执行此操作,但我认为 xib 将是一个更好的选择。
然后通过执行此操作对此视图进行引用
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
textField.inputAccessoryView = YOURCustomView;
return YES;
}
每当你想隐藏它或删除它时,只要把这个
textField.inputAccessoryView = nil;
self.pickerContainerView = [[UIView alloc] initWithFrame:CGRectMake(0, 194, 320, 224)];
self.pickerContainerView.backgroundColor = [UIColor clearColor];
[self.view addSubview:self.pickerContainerView];
UIToolbar *pickerToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, 320, 44)];
pickerToolbar.barStyle = UIBarStyleBlackTranslucent;
[pickerToolbar sizeToFit];
self.lblPickerViewTitle = [[UILabel alloc] initWithFrame:CGRectMake(15, 7, 230, 30)];
self.lblPickerViewTitle.backgroundColor = [UIColor clearColor];
[self.lblPickerViewTitle setFont: [UIFont fontWithName:@"Arial-BoldMT" size:17]];
self.lblPickerViewTitle.textAlignment = UITextAlignmentLeft;
self.lblPickerViewTitle.textColor =[UIColor whiteColor];
[pickerToolbar addSubview:self.lblPickerViewTitle];
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[barItems addObject:flexSpace];
[flexSpace release];
UIBarButtonItem *btnCancel = [[UIBarButtonItem alloc] initWithTitle:@"Cancel" style:UIBarButtonItemStyleBordered target:self action:@selector(closePickerView:)];
[barItems addObject:btnCancel];
[btnCancel release];
UIBarButtonItem *btnDone = [[UIBarButtonItem alloc] initWithTitle:@"ShowPicker" style:UIBarButtonItemStyleBordered target:self action:@selector(donePickerView:)];
[barItems addObject:btnDone];
[btnDone release];
[pickerToolbar setItems:barItems animated:YES];
[barItems release];
[self.pickerContainerView addSubview:pickerToolbar];
在 ShowPicker 方法中,编写用于显示 UIPicker 的代码
您需要先创建另一个UIWindow:
UIWindow *newWindow = [[UIWindow alloc] initWithFrame:CGRectMake(0,100,320,20)];
newWindow.windowLevel = UIWindowLevelStatusBar; // this will make to place your WINDOW above the keyboard
[newWindow makeKeyAndVisible]; // show the new window
// [newWindow addSubview:yourView];
像键盘上的添加按钮一样,你也可以添加像波纹管这样的视图......
在这里,您可以找到键盘窗口,然后设置按钮框架以及您的视图,然后添加到键盘
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardDidShow:)
name:UIKeyboardDidShowNotification
object:nil];
return YES;
}
- (void)keyboardDidShow:(NSNotification *)note {
UIButton *returnBtn = [UIButton buttonWithType:UIButtonTypeCustom];
returnBtn.frame = CGRectMake(0,-25,320,25);
returnBtn.adjustsImageWhenHighlighted = NO;
returnBtn.backgroundColor=[UIColor darkGrayColor];
returnBtn.titleLabel.textColor=[UIColor whiteColor];
[returnBtn setBackgroundImage:[UIImage imageNamed:@"keyBtn.png"] forState:UIControlStateNormal];
[returnBtn addTarget:self action:@selector(keyboardBtn:) forControlEvents:UIControlEventTouchUpInside];
// locate keyboard view
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)
// if (txtTag==5) {
[keyboard addSubview:returnBtn];
}
}
-(IBAction)keyboardBtn:(id)sender{
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)
// if (txtTag==5) {
[keyboard addSubview:yourView];// here add your view with frame
}
}
我希望这对您有所帮助...
:)
来自乔纳斯·施内利的回答
UIWindow *newWindow = [[UIWindow alloc]initWithFrame:CGRectMake(0,100,320,20)];
newWindow.windowLevel = CGFLOAT_MAX; // this will make to place your WINDOW above the keyboard
[newWindow addSubview:yourView];
只需将UIWindowLevelStatusBar
更改为CGFLOAT_MAX
即可。