ios - 限制 iOS 上的文本输入边界

Question

我正在为我的公司开发一个应用程序，但我不是 obj-C 编程语言方面的专家。我试图在互联网上找到一些答案，但没有成功。问题的解决方案可能很简单，但我无法解决。

我想限制文本，使其适合文本框。现在正在发生的事情是，当我开始打字时，它永远在第一行流动，并且当它到达框边界时不会改变下降到第二行。

    otherdetails = [[UITextField alloc] initWithFrame:otherdetailsf];
    otherdetails.text = otherdetailstxt;
    [otherdetails.layer setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]];
    [otherdetails.layer setBorderWidth:2.0];
    otherdetails.layer.cornerRadius = 5;
    otherdetails.clipsToBounds = YES;
    otherdetails.delegate = self;
    otherdetails.contentVerticalAlignment = UIControlContentVerticalAlignmentTop;
    otherdetails.contentHorizontalAlignment = UIControlContentHorizontalAlignmentLeft;

这就是当我在文本字段中输入大量内容时发生的情况......

如何解决这个问题？

谢谢!!

Answer 1

如果您需要在文本到达行尾时支持多行文本，请使用 TextView 而不是文本字段。

来自文档:

The UITextView class implements the behavior for a scrollable, multiline text region. The class supports the display of text using custom style information and also supports text editing. You typically use a text view to display multiple lines of text, such as when displaying the body of a large text document.

所以你的代码应该是:

 otherDetails=[[UITextView alloc]initWithFrame:otherdetailsf];
    otherDetails.text=@"";
    [otherDetails.layer setBorderColor:[[[UIColor grayColor] colorWithAlphaComponent:0.5] CGColor]];
    [otherDetails.layer setBorderWidth:2.0];
    otherDetails.layer.cornerRadius = 5;
    otherDetails.clipsToBounds = YES;
    otherDetails.delegate = self;

    // otherDetails.contentMode=UIControlContentVerticalAlignmentTop;