Question

iOS navigationbar的高度可以修改吗

Answer 1

答案是可以修改的。

修改前:

修改后:

你新建一个工程，将UIWindow的rootViewController设置为一个UINavigationController的实列，然后自定义一个控制器CustomVC,在CustomVC中写如下代码:

- (void)viewDidAppear:(BOOL)animated
{
   [super viewDidAppear:animated];

   NSLog(@"修改前");
   [self printViewHierarchy:self.navigationController.navigationBar];

   //修改NavigaionBar的高度
   self.navigationController.navigationBar.frame = CGRectMake(0, 20, 320, 100);

   NSLog(@"\n修改后");
   [self printViewHierarchy:self.navigationController.navigationBar];
}

- (void)printViewHierarchy:(UIView *)superView
{
   static uint level = 0;
   for(uint i = 0; i < level; i++){
       printf("\t");
   }

   const char *className = NSStringFromClass([superView class]).UTF8String;
   const char *frame = NSStringFromCGRect(superView.frame).UTF8String;
   printf("%s:%s\n", className, frame);

   ++level;
   for(UIView *view in superView.subviews){
       [self printViewHierarchy:view];
   }
   --level;
}

输出结果:

UINavigationBar:{{0, 20}, {320, 44}}
   _UINavigationBarBackground:{{0, 0}, {320, 44}}
       UIImageView:{{0, 44}, {320, 3}}
   UINavigationItemView:{{160, 22}, {0, 0}}
2013-10-29 20:24:36.900 Nav[8957:907]

修改后
UINavigationBar:{{0, 20}, {320, 100}}
   _UINavigationBarBackground:{{0, 0}, {320, 100}}
       UIImageView:{{0, 100}, {320, 3}}
   UINavigationItemView:{{160, 22}, {0, 0}}

Answer 2

不行！IOS是一个封闭的非开元系统！

追答

无法更改

新年快III乐