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[ios] fix textarea offset by keyboard show #3297

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[ios] fix textarea offset by keyboard show #3297

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40 changes: 39 additions & 1 deletion ios/sdk/WeexSDK/Sources/Component/WXEditComponent.mm
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Original file line number Diff line number Diff line change
Expand Up @@ -777,6 +777,36 @@ - (void)setViewMovedUp:(BOOL)movedUp
self.weexInstance.rootView.frame = rect;
}

// UITextView键盘弹起偏移量
- (void)setTextViewMovedUp
{
UIView *rootView = self.weexInstance.rootView;
CGRect rect = self.weexInstance.frame;
CGRect rootViewFrame = rootView.frame;
CGRect inputFrame = [self.view.superview convertRect:self.view.frame toView:rootView];

CGFloat inputOffset = inputFrame.size.height - (rootViewFrame.size.height - inputFrame.origin.y);

UITextView *textView = (UITextView *)self.view;
CGRect cursorRect = [textView caretRectForPosition:textView.selectedTextRange.end];
CGRect cursorRectInWindow = [textView convertRect:cursorRect toView:rootView];
CGFloat textViewOffsetY = cursorRectInWindow.origin.y + cursorRectInWindow.size.height;
CGFloat keyboardOffsetY = rootView.frame.size.height - self.keyboardSize.height;
if (textViewOffsetY >= keyboardOffsetY) {
CGFloat offset = textViewOffsetY - keyboardOffsetY + _upriseOffset;

if (offset > 0) {
rect = (CGRect){
.origin.x = 0.f,
.origin.y = rect.origin.y - offset,
.size = rootViewFrame.size
};
}

self.weexInstance.rootView.frame = rect;
}
}

#pragma mark textview Delegate
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
Expand All @@ -792,6 +822,10 @@ - (BOOL)textViewShouldBeginEditing:(UITextView *)textView

- (void)textViewDidBeginEditing:(UITextView *)textView
{
// 此处获取光标位置时需延迟0.1s，否则获取的位置是上一次的光标位置
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.1f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
[self setTextViewMovedUp];
});
_changeEventString = [textView text];
if (_focusEvent) {
[self fireEvent:@"focus" params:nil];
Expand All @@ -817,6 +851,7 @@ - (void)textViewDidChange:(UITextView *)textView

- (void)textViewDidEndEditing:(UITextView *)textView
{
[self setTextViewMovedUp];
if (![textView.text length]) {
[self setPlaceholderAttributedString];
}
Expand Down Expand Up @@ -997,7 +1032,10 @@ - (void)keyboardWasShown:(NSNotification*)notification
};
CGRect inputFrame = [self.view.superview convertRect:self.view.frame toView:rootView];
if (keyboardRect.origin.y - inputFrame.size.height <= inputFrame.origin.y) {
[self setViewMovedUp:YES];
// textview在delegate中处理
if (![self.view isKindOfClass:UITextView.class]) {
[self setViewMovedUp:YES];
}
self.weexInstance.isRootViewFrozen = YES;
}
}
Expand Down