Ios 目标C警报标题行中断不工作

尝试做两件事：

添加换行符\n时，它所做的只是停止显示后的任何文本。 因此，它只显示“分支名称”（见下文），然后不显示其他内容。我正在寻找绝对最简单的实现

“VBAnnotation.h”文件：

在我的ViewController中：

CLLocationCoordinate2D walnut;
walnut.latitude = WALNUT_LATITUDE;
walnut.longitude = WALNUT_LONGITUDE;
VBAnnotation *branch = [[VBAnnotation alloc] initWithPosition:walnut];
[branch setCoordinate:walnut];
branch.title = @"Name of Branch \n More Info on Branch"; ### adding line break
branch.subtitle = @"This is where the address will go";
branch.customTitle = @"Another custom title to "; ### is this possible?
[self.mapView addAnnotation:branch];

---

为什么不问问谁编写过

VBAnnotation

类？有多种方法可以输入换行符，我希望找到最简单的方法。还有其他人想帮忙吗？你没领会我的意思<代码>VBAnnotation不是标准类。它是由您或某些第三方编写的自定义类。因此，这里可能没有人能够提供帮助。代码更新为显示自定义类。我想我还是找到了答案。我猜无论UILabel上的numberOfLines属性将被设置为1，这将不允许多行

  #import "VBAnnotation.h"

  @implementation VBAnnotation

  @synthesize coordinate;
  @synthesize title;
  @synthesize subtitle;

- initWithPosition:(CLLocationCoordinate2D)coords {
if (self = [super init]) {
    self.coordinate = coords;
}
return self;
}
@end

CLLocationCoordinate2D walnut;
walnut.latitude = WALNUT_LATITUDE;
walnut.longitude = WALNUT_LONGITUDE;
VBAnnotation *branch = [[VBAnnotation alloc] initWithPosition:walnut];
[branch setCoordinate:walnut];
branch.title = @"Name of Branch \n More Info on Branch"; ### adding line break
branch.subtitle = @"This is where the address will go";
branch.customTitle = @"Another custom title to "; ### is this possible?
[self.mapView addAnnotation:branch];