ios7 ios8导航栏透明

自动调整scrollview的insets为0, 然后scrollview就不会向下偏移64px

self.automaticallyAdjustsScrollViewInsets = NO;

导航栏透明:

    self.navigationController.navigationBar.alpha = 0;

 

注销键盘:

[self.toolbar endEditing:YES];