//单一导航栏按钮设置如下
UIBarButtonItem *rightBarItem = [[UIBarButtonItem alloc] initWithTitle:nil style:UIBarButtonItemStylePlain target:self action:@selector(addItemmmClick)];
self.navigationItem.rightBarButtonItem = rightBarItem;
[self.navigationItem.rightBarButtonItem setImage:[[UIImage imageNamed:@"nav_add"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]];
//自定制导航栏按钮实现多个按钮
主要是先创建一个view,然后在上面创建多个按钮,根据需求进行设置按钮的数量,最后把按钮数组作为导航栏的按钮数组即可如下
myRightSubmitBtn.titleLabel.adjustsFontSizeToFitWidth=YES;
[viewBackInNavi addSubview:myRightSubmitBtn];
UIBarButtonItem * right=[[UIBarButtonItem alloc]initWithCustomView:viewBackInNavi];
//将整个viewBackInNavi右移10
UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
negativeSpacer.width =-10;//负数为右移，正数为左移
self.navigationItem.rightBarButtonItems = [NSArray arrayWithObjects:negativeSpacer,right, nil nil];