在我看来,您好像忘记在代码中使用您设置的“样式”对象......您只是实例化了它。您应该将代码修改为如下所示:
NSMutableParagraphStyle *style = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
[style setAlignment:NSTextAlignmentCenter];
[style setLineBreakMode:NSLineBreakByWordWrapping];
UIFont *font1 = [UIFont fontWithName:@"HelveticaNeue-Medium" size:20.0f];
UIFont *font2 = [UIFont fontWithName:@"HelveticaNeue-Light" size:20.0f];
NSDictionary *dict1 = @{NSUnderlineStyleAttributeName:@(NSUnderlineStyleSingle),
NSFontAttributeName:font1,
NSParagraphStyleAttributeName:style}; // Added line
NSDictionary *dict2 = @{NSUnderlineStyleAttributeName:@(NSUnderlineStyleNone),
NSFontAttributeName:font2,
NSParagraphStyleAttributeName:style}; // Added line
NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] init];
[attString appendAttributedString:[[NSAttributedString alloc] initWithString:@"LINE 1\n" attributes:dict1]];
[attString appendAttributedString:[[NSAttributedString alloc] initWithString:@"line 2" attributes:dict2]];
[self.resolveButton setAttributedTitle:attString forState:UIControlStateNormal];
[[self.resolveButton titleLabel] setNumberOfLines:0];
[[self.resolveButton titleLabel] setLineBreakMode:NSLineBreakByWordWrapping];
请注意,我只添加了定义 NSParagraphStyle AttributeName 的行..其他一切都是相同的..这就是我得到的按钮:
这是 Swift 3.0 中的
let style = NSMutableParagraphStyle()
style.alignment = .center
style.lineBreakMode = .byWordWrapping
guard
let font1 = UIFont(name: "HelveticaNeue-Medium", size: 20),
let font2 = UIFont(name: "HelveticaNeue-Light", size: 20) else { return }
let dict1:[String:Any] = [
NSUnderlineStyleAttributeName:NSUnderlineStyle.styleSingle.rawValue,
NSFontAttributeName:font1,
NSParagraphStyleAttributeName:style
]
let dict2:[String:Any] = [
NSUnderlineStyleAttributeName:NSUnderlineStyle.styleNone.rawValue,
NSFontAttributeName:font2,
NSParagraphStyleAttributeName:style
]
let attString = NSMutableAttributedString()
attString.append(NSAttributedString(string: "LINE 1", attributes: dict1))
attString.append(NSAttributedString(string: "line 2", attributes: dict2))
button.setAttributedTitle(attString, for: .normal)
button.titleLabel?.numberOfLines = 0
button.titleLabel?.lineBreakMode = .byWordWrapping