本文为大家分享了iOS键盘弹出遮挡输入框的解决方法，供大家参考，具体内容如下
问题：输入框被键盘遮挡
期望效果：输入框位于键盘上方
解决思路：
监听键盘出现和消失的状态，当键盘出现时，当前视图上移，当输入完成收起键盘时，视图回到初始状态。
难点：视图向上平移的距离
原理都差不多，oc版参考代码：
self.phoneInput = [UITextField new];
self.phoneInput.placeholder = @"请输入...";
[self.view addSubview:self.phoneInput];
///键盘弹出 处理遮挡问题
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillShow:)
name:UIKeyboardWillShowNotification
object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(keyboardWillHide:)
name:UIKeyboardWillHideNotification
object:nil];
}
- (void)keyboardWillShow:(NSNotification *)notification
{
//获取处于焦点中的view
NSArray *textFields = @[self.phoneInput];
UIView *focusView = nil;
for (UITextField *view in textFields) {
if ([view isFirstResponder]) {
focusView = view;
break;
}
}
if (focusView) {
//获取键盘弹出的时间
double duration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
//获取键盘上端Y坐标
CGFloat keyboardY = [notification.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue].origin.y;
//获取输入框下端相对于window的Y坐标
CGRect rect = [focusView convertRect:focusView.bounds toView:[[[UIApplication sharedApplication] delegate] window]];
CGPoint tmp = rect.origin;
CGFloat inputBoxY = tmp.y + focusView.frame.size.height;
//计算二者差值
CGFloat ty = keyboardY- inputBoxY;
NSLog(@"position keyboard: %f, inputbox: %f, ty: %f", keyboardY, inputBoxY, ty);
//差值小于0，做平移变换
[UIView animateWithDuration:duration animations:^{
if (ty < 0) {
self.view.transform = CGAffineTransformMakeTranslation(0, ty);
}
}];
}
}
- (void)keyboardWillHide:(NSNotification *)notification
{
//获取键盘弹出的时间
double duration = [notification.userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
//还原
[UIView animateWithDuration:duration animations:^{
self.view.transform = CGAffineTransformMakeTranslation(0, 0);
}];
}
///<UITextFieldDelegate>
///UITextFieldDelegate编辑完成，视图恢复原状
-(void)textFieldDidEndEditing:(UITextField *)textField
{
self.view.frame =CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width,[[UIScreen mainScreen] bounds].size.height);
}
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持华域联盟。
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