关于iphone：在呈现UIActivityViewController时隐藏的UIToolbar的UIBarButtonItems

UIBarButtonItems of a UIToolbar hiding when presenting UIActivityViewController

hiding

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- (void)viewDidLoad {
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 0, self.view.bounds.size.width, 40)];
UIBarButtonItem *button = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:@selector(didTapAction)];
toolbar.items = [NSArray arrayWithObject:button];
[self.view addSubview:toolbar];
}

- (void)didTapAction {
NSArray *items = [NSArray arrayWithObjects:@"Text", nil];
UIActivityViewController *sharing = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
[self presentViewController:sharing animated:YES completion:nil];
}

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知道这是一个很老的话题，但是那些希望在此页面寻求解决方案的人，这里您可以：

在iOS7中，您可以使用此方法显示/隐藏工具栏按钮：

1	if(// your code Condition)

{self.toolbarBtn1.enabled = YES;
self.toolbarBtn1.tintColor = nil; }
别的
{self.toolbarBtn1.enabled =否；
self.toolbarBtn1.tintColor = [UIColor clearColor]; }

找到了解决方法。只需在展示前去除所有物品，然后再添加它们即可。

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- (void)didTapAction {
NSArray *items = [NSArray arrayWithObjects:@"Text", nil];
UIActivityViewController *sharing = [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
NSArray *barItems = toolbar.items;
toolbar.items = nil;
[self.navigationController presentViewController:sharing animated:YES completion:nil];
toolbar.items = barItems;
}