xcode 我们如何在导航栏中的 UIBarButtonItem 中放置两行
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How can we put two line in UIBarButtonItem in Navigation Bar
提问by Ray Fix
"Now Playing" is in One line in UIBarButtonItem. I have to put it in two lines, like "Now" is ay top and "Playing" is at bottom.I have written the following line of code:-
“正在播放”在 UIBarButtonItem 的一行中。我必须把它分成两行，比如“现在”是顶部，“播放”是底部。我编写了以下代码行：-
UIBarButtonItem *flipButton = [[UIBarButtonItem alloc]
initWithTitle:@"Now Playing"
style:UIBarButtonItemStyleBordered
target:self
action:@selector(flipView)];
self.navigationItem.rightBarButtonItem = flipButton;
So i want to pu line break in between "Now Playing". So please help me out.
所以我想在“正在播放”之间换行。所以请帮帮我。
回答by Ray Fix
Yes you can. It is fairly simple to do. Create a multiline button and use that. The "trick" is to set the titleLabel numberOfLines property so that it likes multilines.
是的你可以。做起来相当简单。创建一个多行按钮并使用它。“技巧”是设置 titleLabel numberOfLines 属性，使其喜欢多行。
UIButton* button = [UIButton buttonWithType:UIButtonTypeCustom];
button.titleLabel.numberOfLines = 0;
[button setTitle:NSLocalizedString(@"Now\nPlaying", nil) forState:UIControlStateNormal];
[button sizeToFit];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:button];
When you specify a button type of custom it expects you to configure everything... selected state, etc. which is not shown here to keep the answer focused to the problem at hand.
当您指定自定义按钮类型时，它希望您配置所有内容...选择状态等，此处未显示以将答案集中在手头的问题上。
回答by Lucas
- (void)createCustomRightBarButton_
{
UILabel * addCustomLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, 64, 25)] autorelease];
addCustomLabel.text =@"Now\nPlaying";
addCustomLabel.textColor = [UIColor whiteColor];
addCustomLabel.font = [UIFont boldSystemFontOfSize:11];
addCustomLabel.numberOfLines = 2;
addCustomLabel.backgroundColor = [UIColor clearColor];
addCustomLabel.textAlignment = UITextAlignmentCenter;
CGSize size = addCustomLabel.bounds.size;
UIGraphicsBeginImageContext(size);
CGContextRef context = UIGraphicsGetCurrentContext();
[addCustomLabel.layer renderInContext: context];
CGImageRef imageRef = CGBitmapContextCreateImage(context);
UIImage * img = [UIImage imageWithCGImage: imageRef];
CGImageRelease(imageRef);
CGContextRelease(context);
self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithImage:img
style:UIBarButtonItemStyleBordered
target:self
action:@selector(flipView)]
autorelease];
}
回答by Henrik Hartz
You can host a UIButton as customView inside your bar button (either set the bar button item customView or you can drag one directly on top of your UIBarButtonItem), hook it up as an outlet, then do;
您可以将 UIButton 作为 customView 托管在您的栏按钮内（设置栏按钮项 customView 或您可以直接将其拖到您的 UIBarButtonItem 之上），将其作为插座连接，然后执行；
-(void) viewDidLoad
{
//...
self.customButton.titleLabel.numberOfLines = 2;
self.customButton.suggestionsButton.titleLabel.lineBreakMode = UILineBreakModeWordWrap;
self.customButton.suggestionsButton.titleLabel.textAlignment = UITextAlignmentCenter;
}
which in my case becomes
在我的情况下变成
回答by bandw
I create 2 PNG images by myself, and it looks good.
我自己创建了 2 个 PNG 图片，看起来不错。
UIImage *img = [UIImage imageNamed:@"nowplaying.png"];
UIBarButtonItem *nowPlayingButtonItem = [[[UIBarButtonItem alloc] initWithImage:img style:UIBarButtonItemStyleBordered target:delegate action:@selector(presentNowPlayingMovie)] autorelease];
