自定义导航栏

自定义titleView

UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(0, 0, 150, 30)];
[textField setBorderStyle:UITextBorderStyleRoundedRect];
[textField setTextAlignment:UITextAlignmentLeft];
[textField setPlaceholder:@"搜索"];

self.navigationItem.titleView = textField;

自定义导航栏右侧按钮

UISwitch *simpleSwitch = [[UISwitch alloc] init];
simpleSwitch.on = YES;
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:simpleSwitch];