断线模式和adjustsFontSizeToFitWidth不工作的obj c

Question

我正在用多个按钮填充视图(按钮的数量是不同的)。按钮和按钮标题的大小不同)。我需要设置按钮标题在2行或1行根据字数在标题。此外，字体大小应与按钮框大小兼容。包括我这里的一些代码。`

     // --------------------------
    button1.titleLabel.font = [UIFont fontWithName:@"ProximaNovaSoft-Bold" size:35];
button1.titleLabel.numberOfLines=0;
    button1.titleLabel.lineBreakMode= NSLineBreakByWordWrapping;
    button1.titleLabel.adjustsFontSizeToFitWidth=YES;
    [button1.titleLabel setTextAlignment: NSTextAlignmentCenter];

   // --------------------------

    [button1 setBackgroundImage:[UIImage imageNamed:imgColor1] forState:UIControlStateNormal];
    [self.view addSubview:button1];

    button2 = [[UIButton alloc] init];
    button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button2.tag=2;
    [button2 addTarget:self
                action:@selector(createAlert:)
      forControlEvents:UIControlEventTouchUpInside];
    button2.frame = CGRectMake(self.view.bounds.size.width/6-5, button1.frame.origin.y+(button1.frame.size.height/3)+button1.frame.size.height/2+15, self.view.bounds.size.width/3, self.view.bounds.size.width/3);
    NSString *imgColor2 = [alertColorArray objectAtIndex:1];
    if ([imgColor2 isEqualToString:@"RED"] || [imgColor2 isEqualToString:@"BLUE"] || [imgColor2 isEqualToString:@"YELLOW"]) {
        imgColor2 = [imgColor2 stringByAppendingString:@".png"];
    }
    else
    {
        imgColor2 = @"YELLOW.png";
    }
    [button2 setTitle:[alertNameArray objectAtIndex:1] forState:UIControlStateNormal];
    [button2 setTintColor:[UIColor whiteColor]];
    button2.titleLabel.font = [UIFont fontWithName:@"ProximaNovaSoft-Bold" size:25];

     // --------------------------
   // button2.titleLabel.lineBreakMode= NSLineBreakByWordWrapping;
    button2.titleLabel.numberOfLines=2;
    button2.titleLabel.adjustsFontSizeToFitWidth=YES;

     // --------------------------
    [button2.titleLabel setTextAlignment: NSTextAlignmentCenter];
    [button2 setBackgroundImage:[UIImage imageNamed:imgColor2] forState:UIControlStateNormal];
    [self.view addSubview:button2];

`

但这不是我所需要的。这是怎么回事？

Answer 1

通过计算文本中的单词数来解决这一问题，并相应地设置numberoflines。button1.titleLabel.numberOfLines=[self wordCount:[alertNameArray objectAtIndex:0]];。

Answer 2

试试看

//change scale factor accordingly

    [LABEL setMinimumScaleFactor:12.0/[UIFont labelFontSize]];