objective-c - 将 NSString 转换为 NSAttribtuedString 以进行绘图

Question

我有一个正在用代码绘制的字符串

[@"-"drawInRect: r
带字体:f2
lineBreakMode:UILineBreakModeWordWrap
对齐:UITextAlignmentCenter];

但是我想更改此字符串中的颜色，因为这对于 NSString 是不可能的，我希望将其修改为 NSAttributedString。

但是这不起作用，这是我修改后的代码，我也找不到其他参数的属性

NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObjectsAndKeys:f2,NSFontAttributeName,
                                        nil];

    NSAttributedString *drawingString = [[NSAttributedString alloc]  initWithString:@"-" attributes:attrsDictionary];

    [drawingString drawInRect:r];

如果这是正确的方法，我们将不胜感激。

Answer 1

谢谢!这是我最终编辑的代码

    NSMutableParagraphStyle *paraAttr = [[NSMutableParagraphStyle defaultParagraphStyle ] mutableCopy];
    [paraAttr setAlignment:UITextAlignmentCenter];
    [paraAttr setLineBreakMode:UILineBreakModeWordWrap];


    NSDictionary *attrsDictionary = [NSDictionary dictionaryWithObjectsAndKeys:f2,NSFontAttributeName,
                                        [UIColor grayColor],NSForegroundColorAttributeName,
                                        paraAttr,NSParagraphStyleAttributeName,
                                         nil];


    NSAttributedString *drawingString = [[NSAttributedString alloc]  initWithString:@"•" attributes:attrsDictionary];


    [drawingString drawInRect:r];