UIBarButtonItem偏移量

Question

你可以看到按钮左边的距离？如何删除这个距离？

Answer 1

在按钮左侧添加一个垫片,类似于:

UIBarButtonItem *backButtonItem = ....;

UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
spacer.width = -5; 

self.navigationItem.leftBarButtonItems = @[ spacer, backButtonItem ];