Ios 如何使自定义键盘可以解锁？

从iOS 5开始，iPad键盘可以解锁/拆分

但当我的应用程序首次启动时，我的自定义键盘无法解锁。只有在显示并取消警报视图后，键盘才能解锁

我做了一个基于单视图应用程序模板的测试项目，如下所示：

MyViewController.m：

#import "MyViewController.h"
#import "MyEditor.h"

@implementation MyViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    MyEditor *editor = [[MyEditor alloc] initWithFrame:CGRectMake(0, 640, 768, 100)];
    editor.backgroundColor = [UIColor cyanColor];
    [self.view addSubview:editor];
}

@end

#import "MyEditor.h"
#import "MyKeyboard.h"

@implementation MyEditor

- (CGSize)intrinsicContentSize {
    return CGSizeMake(UIViewNoIntrinsicMetric, 100);
}

- (UIView *)inputView {
    return [MyKeyboard sharedKeyboard];
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if ([self isFirstResponder]) {
        [self resignFirstResponder];

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
        [alertView show];
    }
    else {
        [self becomeFirstResponder];
    }
}

@end

#import "MyKeyboard.h"

@implementation MyKeyboard

+ (MyKeyboard *)sharedKeyboard {
    static MyKeyboard *sharedKeyboard;
    if (sharedKeyboard == nil) {
        sharedKeyboard = [[MyKeyboard alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
    }
    return sharedKeyboard;
}

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [super setAutoresizingMask:UIViewAutoresizingFlexibleHeight];
        [super setBackgroundColor:[UIColor yellowColor]];
    }
    return self;
}

@end

MyEditor.m：

#import "MyViewController.h"
#import "MyEditor.h"

@implementation MyViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    MyEditor *editor = [[MyEditor alloc] initWithFrame:CGRectMake(0, 640, 768, 100)];
    editor.backgroundColor = [UIColor cyanColor];
    [self.view addSubview:editor];
}

@end

#import "MyEditor.h"
#import "MyKeyboard.h"

@implementation MyEditor

- (CGSize)intrinsicContentSize {
    return CGSizeMake(UIViewNoIntrinsicMetric, 100);
}

- (UIView *)inputView {
    return [MyKeyboard sharedKeyboard];
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if ([self isFirstResponder]) {
        [self resignFirstResponder];

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
        [alertView show];
    }
    else {
        [self becomeFirstResponder];
    }
}

@end

#import "MyKeyboard.h"

@implementation MyKeyboard

+ (MyKeyboard *)sharedKeyboard {
    static MyKeyboard *sharedKeyboard;
    if (sharedKeyboard == nil) {
        sharedKeyboard = [[MyKeyboard alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
    }
    return sharedKeyboard;
}

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [super setAutoresizingMask:UIViewAutoresizingFlexibleHeight];
        [super setBackgroundColor:[UIColor yellowColor]];
    }
    return self;
}

@end

我的键盘.m：

#import "MyViewController.h"
#import "MyEditor.h"

@implementation MyViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    MyEditor *editor = [[MyEditor alloc] initWithFrame:CGRectMake(0, 640, 768, 100)];
    editor.backgroundColor = [UIColor cyanColor];
    [self.view addSubview:editor];
}

@end

#import "MyEditor.h"
#import "MyKeyboard.h"

@implementation MyEditor

- (CGSize)intrinsicContentSize {
    return CGSizeMake(UIViewNoIntrinsicMetric, 100);
}

- (UIView *)inputView {
    return [MyKeyboard sharedKeyboard];
}

- (BOOL)canBecomeFirstResponder {
    return YES;
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if ([self isFirstResponder]) {
        [self resignFirstResponder];

        UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:nil message:nil delegate:nil cancelButtonTitle:@"Dismiss" otherButtonTitles:nil];
        [alertView show];
    }
    else {
        [self becomeFirstResponder];
    }
}

@end

#import "MyKeyboard.h"

@implementation MyKeyboard

+ (MyKeyboard *)sharedKeyboard {
    static MyKeyboard *sharedKeyboard;
    if (sharedKeyboard == nil) {
        sharedKeyboard = [[MyKeyboard alloc] initWithFrame:CGRectMake(0, 0, 1, 1)];
    }
    return sharedKeyboard;
}

- (id)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        [super setAutoresizingMask:UIViewAutoresizingFlexibleHeight];
        [super setBackgroundColor:[UIColor yellowColor]];
    }
    return self;
}

@end

测试步骤如下：

启动应用程序

轻触编辑器，键盘将显示

通过拖动键盘的右下角，确认无法移动键盘

再次点击编辑器，键盘将隐藏，并显示警报视图

关闭警报视图

第三次轻触编辑器，键盘将显示

确认现在可以通过拖动键盘右下角来移动键盘

完成了

我想知道如何使键盘在启动后一开始就可以松开。欢迎提供任何信息