iOS自定义键盘切换效果

- (void)viewDidLoad {  [super viewDidLoad];  // Do any additional setup after loading the view, typically from a nib.  self.title = @"小飞哥键盘";  self.textField = [[UITextField alloc] initWithFrame:CGRectMake(50, 168, kScreenWidth - 100, 50)];  self.textField.delegate = self;  self.textField.backgroundColor = [UIColor greenColor];  self.textField.placeholder = @"(默认系统键盘)";     [self.view addSubview:self.textField];     UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hidenKeyBoard)];  [self.view addGestureRecognizer:tap];     UISegmentedControl *segment = [[UISegmentedControl alloc] initWithItems:@[@"键盘1",@"键盘2",@"键盘3",@"系统键盘"]];  segment.frame = CGRectMake(0, 100, kScreenWidth, 50);  [segment addTarget:self action:@selector(keyBoardTypeAction:) forControlEvents:UIControlEventValueChanged];  [self.view addSubview:segment];   } - (void)keyBoardTypeAction:(id )sender{  UISegmentedControl *seg = (UISegmentedControl *)sender;  NSLog(@"intage = %ld", (long)seg.selectedSegmentIndex);     if (seg.selectedSegmentIndex == 0) {    self.xfg_keyboard = [[XFG_KeyBoard alloc] initWithNumber:@1];    self.textField.inputView = self.xfg_keyboard;    self.xfg_keyboard.delegate = self;    [self.textField reloadInputViews];  }  if (seg.selectedSegmentIndex == 1) {    self.xfg_keyboard = [[XFG_KeyBoard alloc] initWithNumber:@2];    self.textField.inputView = self.xfg_keyboard;    self.xfg_keyboard.delegate = self;    [self.textField reloadInputViews];     }     if (seg.selectedSegmentIndex == 2) {    self.xfg_keyboard = [[XFG_KeyBoard alloc] initWithNumber:@3];    self.textField.inputView = self.xfg_keyboard;    self.xfg_keyboard.delegate = self;    [self.textField reloadInputViews];  }     if (seg.selectedSegmentIndex == 3) {    self.textField.inputView = nil;    [self.textField reloadInputViews];  }  }