uinavigationbar高度和景观模式

您可以在uiview的layoutSubviews方法中调整导航栏的大小,如下所示:

- (void)layoutSubviews {
    [super layoutSubviews];

    // Let navBar tell us what height it would prefer at the current orientation
    CGFloat navBarHeight = [navBar sizeThatFits:self.bounds.size].height;

    // Resize navBar
    navBar.frame = CGRectMake(0, 0, self.bounds.size.width, navBarHeight);
}