Question

我认为这将是一件容易的事情，因为人们会经常想要这样做，但我已经四处寻找并尝试了不同的方法，但似乎没有任何效果。

我想要做的就是创建一个包含两行Text的UITextView。

如果文字太长，并且分为3行，我想自动调整字体，直到它适合2行。

从概念上讲，我打算做一个递归函数，不断缩小文本，直到它适合两行（基于文本字段的高度），但我无法将它拉下来。

非常感谢任何建议。

Answer 1

使用UILabel并设置以下属性：

adjustsFontSizeToFitWidth = YES;
minimumFontSize = [UIFont systemFontofSize: 10]; // or whatever suits your app
numberOfLines = 2;

Answer 2

如果有其他人遇到这个问题，我在这里找到了答案：

http://www.11pixel.com/blog/28/resize-multi-line-text-to-fit-uilabel-on-iphone/

//Create a string with the text we want to display.
self.ourText = @"This is your variable-length string. Assign it any way you want!";

/* This is where we define the ideal font that the Label wants to use.
   Use the font you want to use and the largest font size you want to use. */
UIFont *font = [UIFont fontWithName:@"Marker Felt" size:28];

int i;
/* Time to calculate the needed font size.
   This for loop starts at the largest font size, and decreases by two point sizes (i=i-2)
   Until it either hits a size that will fit or hits the minimum size we want to allow (i > 10) */
for(i = 28; i > 10; i=i-2)
{
    // Set the new font size.
    font = [font fontWithSize:i];
    // You can log the size you're trying: NSLog(@"Trying size: %u", i);

    /* This step is important: We make a constraint box 
       using only the fixed WIDTH of the UILabel. The height will
       be checked later. */ 
    CGSize constraintSize = CGSizeMake(260.0f, MAXFLOAT);

    // This step checks how tall the label would be with the desired font.
    CGSize labelSize = [self.ourText sizeWithFont:font constrainedToSize:constraintSize lineBreakMode:UILineBreakModeWordWrap];

    /* Here is where you use the height requirement!
       Set the value in the if statement to the height of your UILabel
       If the label fits into your required height, it will break the loop
       and use that font size. */
    if(labelSize.height <= 180.0f)
        break;
}
// You can see what size the function is using by outputting: NSLog(@"Best size is: %u", i);

// Set the UILabel's font to the newly adjusted font.
msg.font = font;

// Put the text into the UILabel outlet variable.
msg.text = self.ourText;

Answer 3

我觉得这个问题有点迟了但是因为谷歌这个查询的最高结果是一个更合适的（复制和粘贴）解决方案可能跟随

- (BOOL)textViewShouldEndEditing:(UITextView *)textView{

if (textView.contentSize.height > textView.frame.size.height) {
  int fontIncrement = 1;
    while (textView.contentSize.height > textView.frame.size.height) {
        textView.font = [UIFont fontWithName:@"Copperplate" size:25.0 - fontIncrement];
        fontIncrement++;

    }

}
else {
    int fontIncrement = 1;
    while (textView.font.pointSize < 25.0) {
        textView.font = [UIFont fontWithName:@"Copperplate" size:8.0 + fontIncrement];
        fontIncrement++;

    }
}
return YES;

}

在上面的代码中，25是要为textview设置的maxFontSize变量。

P.S。（BOOL）textViewShouldEndEditing：是在编辑完成并且键盘被重新调用之前调用的uitextview的委托方法之一，因此您还应该在视图控制器中适当地包含委托protol。

UITextView autoSize

3 个答案: