我正在使用TTTAttributedLabel显示一些垂直居中的文本(默认在TTTAttributedLabel
和中UILabel
),单行(也是默认)和截断的尾线中断。
TTTAttributedLabel *label1 = [[TTTAttributedLabel alloc] initWithFrame:CGRectMake(20.0, 40.0, 200.0, 60.0)];
label1.backgroundColor = [UIColor lightGrayColor];
label1.verticalAlignment = TTTAttributedLabelVerticalAlignmentCenter;
[self.view addSubview:label1];
TTTAttributedLabel *label2 = [[TTTAttributedLabel alloc] initWithFrame:CGRectMake(20.0, 120.0, 200.0, 60.0)];
label2.backgroundColor = [UIColor lightGrayColor];
label2.verticalAlignment = TTTAttributedLabelVerticalAlignmentCenter;
[self.view addSubview:label2];
NSString *shortString = @"This is a short string.";
NSString *longString = @"This is a somewhat longer string. In fact its really long. So long it takes up alot of space.";
NSDictionary *attributes = @{NSFontAttributeName: [UIFont systemFontOfSize:16.0]};
NSMutableAttributedString *shortAttributedString = [[NSMutableAttributedString alloc] initWithString:shortString attributes:attributes];
label1.attributedText = shortAttributedString;
NSMutableAttributedString *longAttributedString = [[NSMutableAttributedString alloc] initWithString:longString attributes:attributes];
label2.attributedText = longAttributedString;
上面的代码呈现以下内容:
两个标签的唯一区别是字符串长度。如您所见,第二个字符串没有垂直居中。