本文介绍了一个iOS应用中微博发布的实现方式，包括利用UITextView进行文字输入，并通过自定义的YSWeiBoPublishToolbar实现底部工具栏的功能。文章还详细说明了如何在键盘弹出时调整工具栏的位置以保持良好的用户体验。
- (UITextView *)publishTextView
{
if (!_publishTextView)
{
UITextView *publishTextView = [[UITextView alloc] init];
publishTextView.font = ContentTitleFont;
publishTextView.frame = CGRectMake(0, 0, Screen_Width, Screen_Height);
// 键盘成为第一响应者
[publishTextView becomeFirstResponder];
self.publishTextView = publishTextView;
[self.view addSubview:publishTextView];
}
return _publishTextView;
}
- (YSWeiBoPublishToolbar *)publishToolbar
{
if (!_publishToolbar)
{
YSWeiBoPublishToolbar *publishToolbar = [[YSWeiBoPublishToolbar alloc] init];
CGFloat publishToolbarHeight = 44.f;
publishToolbar.frame = CGRectMake(0, Screen_Height - publishToolbarHeight, Screen_Width, publishToolbarHeight);
self.publishToolbar = publishToolbar;
[self.view addSubview:publishToolbar];
}
return _publishToolbar;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.publishTextView.delegate = self;
self.publishToolbar;
[self setupNavigationItem];
[YSWeiBoNotificationCenter addObserver:self selector:@selector(keyboardWillChangeFrame:) name:UIKeyboardWillChangeFrameNotification object:nil];
}
#pragma mark - 监听方法
/** */
- (void)keyboardWillChangeFrame:(NSNotification *)notification
{
NSDictionary *userInfo = notification.userInfo;
// 动画的持续时间
double duration = [userInfo[UIKeyboardAnimationDurationUserInfoKey] doubleValue];
// 键盘的frame
CGRect keyboardF = [userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue];
[UIView animateWithDuration:duration animations:^{
if (keyboardF.origin.y > self.view.height) { // 键盘的Y值已经远远超过了控制器view的高度
self.publishToolbar.y = self.view.height - self.publishToolbar.height;
} else {
self.publishToolbar.y = keyboardF.origin.y - self.publishToolbar.height;
}
}];
}
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