ios - 为什么 NSLineBreakByWordWrapping 拆分单词？

Question

通过使用 NSAttributedString，我尝试在三角形内创建文本，如下所示；

http://postimg.org/image/rp9fukgaj/

我使用“NSLineBreakByWordWrapping”方法在定义的形状内调整文本。但是文本的第一个词 split 了，我找不到解决方案。我希望我的文本跳转到下一行而不是拆分。我该怎么做？

下面是我用的代码；

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.view.backgroundColor=[UIColor blackColor];
    CTFontRef fontRef = CTFontCreateWithName((CFStringRef)@"HelveticaNeue-Regular", 15.0f, NULL);     
    NSMutableParagraphStyle* paragraph = [NSMutableParagraphStyle new];
    paragraph.headIndent = 10;
    paragraph.firstLineHeadIndent = 10;
    paragraph.tailIndent = -10;
    paragraph.lineBreakMode = NSLineBreakByWordWrapping;
    paragraph.alignment = NSTextAlignmentCenter;
    paragraph.paragraphSpacing = 15;    
    NSDictionary *attrDictionary = [NSDictionary dictionaryWithObjectsAndKeys: (__bridge id)fontRef, (NSString *)kCTFontAttributeName, (id)[[UIColor whiteColor] CGColor], (NSString *)(kCTForegroundColorAttributeName),paragraph,NSParagraphStyleAttributeName, nil];    
    CFRelease(fontRef);
    NSAttributedString *attString = [[NSAttributedString alloc] initWithString:@"Initially, now I create the paragraph style and apply it to the first character. Note how the margins are dictated: the tailIndent is negative, to bring the right margin leftward, and the firstLineHeadIndent must be set separately, as the headIndent does not automatically apply to the first line." attributes:attrDictionary];
    [(CustomView *)[self view] setAttString:attString];
}

Answer 1

查看 documentation对于 NSLineBreakMode，显然如果该词不适合给定的行，该词将被分解以适合。如果你的文本是静态的，你可以只插入一个换行符来跳过三角形的第一部分；否则，您将不得不聪明地弄清楚如何克服这个限制。