两种比较好的方式:
方式一: 监听通知 UITextFieldTextDidBeginEditingNotification
#pragma mark - <控制器生命周期>
- (void)viewDidLoad {
[super viewDidLoad];
// 添加tap手势结束当前编辑(隐藏键盘⌨️)
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(endEditing)];
[self.view addGestureRecognizer:tap];
_textFieldObserver = [[NSNotificationCenter defaultCenter] addObserverForName:UITextFieldTextDidBeginEditingNotification object:nil queue:[NSOperationQueue mainQueue] usingBlock:^(NSNotification * _Nonnull note) {
if ([note isKindOfClass:[UITextField class]]) {
_currentTextField = note.object;
}
}];
}
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
[[NSNotificationCenter defaultCenter] removeObserver:_textFieldObserver];
}
#pragma mark - <结束编辑>
- (void)endEditing {
[_currentTextField endEditing:YES];
}
方式二: 使用UITextField的代理方法
#pragma mark - <控制器生命周期>
- (void)viewDidLoad {
[super viewDidLoad];
// 添加tap手势结束当前编辑(隐藏键盘⌨️)
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(endEditing)];
[self.view addGestureRecognizer:tap];
}
// 通过代理方法获取当前的 UITextField
#pragma mark - <UITextFieldDelegate>
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField {
_currentTextField = textField;
return YES;
}
#pragma mark - <结束编辑>
- (void)endEditing {
[_currentTextField endEditing:YES];
}
总结:
对比两种方式, 其实只是获取当前 UITextField 的方式不同而已, 能获取到 FirstResponder 的 UITextField 就能很容易控制键盘(隐藏/出现).
