未显示iOS NSTextAttachment图像

Question

NSTextAttachment锁定图像在边缘处被切断，但当线在边缘处未中断时，则可以看到锁定图标。我希望图标移动到下一行，就像一个单词移动到下一行。

示例如下：

    NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
    attachment.image = [UIImage imageNamed:@"lock.png"];
    NSString *stringHeadline = @"This is a example sample sentence. Why I do";
    NSAttributedString *attachmentLock = [NSAttributedString attributedStringWithAttachment:attachment];
    NSAttributedString *myText = [[NSMutableAttributedString alloc] initWithString:stringHeadline];
    NSMutableAttributedString *lockString = [[NSMutableAttributedString alloc] initWithAttributedString:myText];

    [lockString appendAttributedString:attachmentLock];
    lblHeadline.attributedText = lockString;
    [lblHeadline sizeToFit];

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当文本靠近边缘时，锁形图标消失。

Answer 1

只需在NSTextAttachment后面追加一个空格即可。否则，当空间不足时，NSTextAttachment不会像普通文本那样更改为新行。我相信这是苹果的一个bug。

您的代码应该如下所示：

NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:@"lock.png"];
NSString *stringHeadline = @"This is a example sample sentence. Why I do";
NSAttributedString *attachmentLock = [NSAttributedString attributedStringWithAttachment:attachment];
NSAttributedString *myText = [[NSMutableAttributedString alloc] initWithString:stringHeadline];
NSMutableAttributedString *lockString = [[NSMutableAttributedString alloc] initWithAttributedString:myText];

[lockString appendAttributedString:attachmentLock];
/** 
 * Here I'm adding a space after NSTextAttachment just to make sure that
 * the NSTextAttachment will auto change to next line like normal text does.
 * Otherwise the NSTextAttachment does not move to the new line.
 */
[lockString appendAttributedString: [[NSAttributedString alloc] initWithString:@" "]];
lblHeadline.attributedText = lockString;
[lblHeadline sizeToFit];

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