ios – 组合UIBarButtonItem在进入视图时稍微改变位置

在导航栏中使用UIBarButtonSystemItemCompose按钮显示新视图时,该位置稍微关闭,并在视图进入视图后进行调整.

我认为这是iOS中的一个bug(使用了8.3版本).它只在使用UIBarButtonSystemItemCompose时发生.其他类型的按钮(系统,文本或自定义)不会发生.

复制此错误所需的唯一@L_874_7@是将该ViewController@L_874_7@与将进入视图的视图一起使用：

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // Do any additional setup after loading the view,typically from a nib.

    UIBarButtonItem* composeBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
                                      target:nil
                                      action:nil];

    [self.navigationItem setrightBarButtonItem:composeBarButtonItem animated:YES];
}

@end

我已经在GitHub上创建了一个最小的@L_874_7@来重现问题：https://github.com/jvdvleuten/iOSComposeBarButtonItemBug

看起来与此相关：UIBarButtonItems shift position when UINavigationController is presented modally,除了我的错误只出现在使用UIBarButtonSystemItemCompose.

有任何想法吗？

UIBarButtonItem* composeBarButtonItem =
[[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemCompose
                                              target:nil
                                              action:nil];

UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc]
                                       initWithBarButtonSystemItem:UIBarButtonSystemItemFixedspace
                                       target:nil action:nil];
negativeSpacer.width = -6;

UIBarButtonItem *dumbBarButtonItem = [UIBarButtonItem new];

self.navigationItem.rightBarButtonItems = @[dumbBarButtonItem,negativeSpacer,self.composeBarButtonItem];