带有两行标签的 UIBarButtonItem 宽度

Question

我想知道如何从 UIBarButtonItem 中的两行标签中去掉左右空格，它的视图由 setCustomView 设置如下：

UIButton* forwardButton = [UIButton buttonWithType:101];

[forwardButton setTransform:CGAffineTransformMakeScale(-1.0, 1.0)];
[forwardButton.titleLabel setTransform:CGAffineTransformMakeScale(-1.0, 1.0)];

[forwardButton setTitle:@"Now\nPlaying" forState:UIControlStateNormal];
[forwardButton addTarget:self action:@selector(openPlayer) forControlEvents:UIControlEventTouchUpInside];

[forwardButton.titleLabel setNumberOfLines:2];
[forwardButton.titleLabel setLineBreakMode:NSLineBreakByWordWrapping];
[forwardButton.titleLabel setTextAlignment:NSTextAlignmentCenter];
[forwardButton.titleLabel setFont:[UIFont boldSystemFontOfSize:10]];

[navButton setCustomView:forwardButton];

Here 是我得到的结果。

按钮的宽度就像标签在一行中写有文字一样，例如this。

Answer 1

您可以尝试更改按钮的边界。

UIButton* forwardButton = [UIButton buttonWithType:101];
[forwardButton setTransform:CGAffineTransformMakeScale(-1.0, 1.0)];
[forwardButton.titleLabel setTransform:CGAffineTransformMakeScale(-1.0, 1.0)];

[forwardButton setTitle:@"Now\nPlaying" forState:UIControlStateNormal];
[forwardButton.titleLabel setNumberOfLines:2];
[forwardButton.titleLabel setLineBreakMode:NSLineBreakByWordWrapping];
[forwardButton.titleLabel setTextAlignment:NSTextAlignmentCenter];
[forwardButton.titleLabel setFont:[UIFont boldSystemFontOfSize:10]];

forwardButton.bounds = CGRectMake(0, 0, 30, 30);


UIBarButtonItem* forwardButtonItem = [[UIBarButtonItem alloc] initWithCustomView: forwardButton];
self.navigationItem.rightBarButtonItem = forwardButtonItem;

对此进行了测试并有效

Answer 2

NSString   *titleStr=@"Now\Playing";
BarButton.titleLabel setLineBreakMode:UILineBreakModeWordWrap];

[BarButton setTitle:titleStr forState:UIControlStateNormal];