容易忽略的功能

1.滑动的时候隐藏navigation bar

navigationController.hidesBarsOnSwipe = Yes;

2. 消除导航条返回键带的title

[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60)

forBarMetrics:UIBarMetricsDefault];

3. 将Navigationbar变成透明而不模糊

[self.navigationController.navigationBar setBackgroundImage:[UIImage new]

forBarMetrics:UIBarMetricsDefault];

self.navigationController.navigationBar .shadowImage = [UIImage new];

self.navigationController.navigationBar .translucent = YES;