NSTextAttachment 自定义后的循环引用问题

• NSTextAttachment的封装类

#import "DDAutoFitTextAttachment.h"@implementation DDAutoFitTextAttachment/** 重载此方法 使得图片的大小和行高是一样的。 @param textContainer textContainer @param lineFrag lineFrag @param position position @param charIndex charIndex @return attachmentBounds */- (CGRect)attachmentBoundsForTextContainer:(NSTextContainer *)textContainer proposedLineFragment:(CGRect)lineFrag glyphPosition:(CGPoint)position characterIndex:(NSUInteger)charIndex{    return CGRectMake(0, -3, lineFrag.size.height, lineFrag.size.height);}@end复制代码

• NSAttributedString的分类

#import "NSAttributedString+DDLabel.h"#import "DDAutoFitTextAttachment.h"@implementation NSAttributedString (DDLabel)- (instancetype)initWithTitle:(NSString *)title                    titleFont:(UIFont *)titleFont                   titleColor:(UIColor *)titleColor                        image:(UIImage *)image                imagePosition:(DDAttributedStringImagePosition)imagePosition{        NSMutableAttributedString *superAttrStr = [[NSMutableAttributedString alloc]                                        initWithString:title                                        attributes:                                        @{
   NSFontAttributeName: titleFont,                                          NSForegroundColorAttributeName: titleColor}];        DDAutoFitTextAttachment *imageAttachment = [[DDAutoFitTextAttachment alloc] init];    imageAttachment.image = image;    NSAttributedString *imageAttStr = [NSAttributedString attributedStringWithAttachment:imageAttachment];        switch (imagePosition) {        case DDAttributedStringImagePositionLeft:        {            [superAttrStr insertAttributedString:imageAttStr atIndex:0];        }            break;        case DDAttributedStringImagePositionMiddle:        {            NSAssert(imagePosition != DDAttributedStringImagePositionMiddle , @"图片不能设置为 DDAttributedStringImagePositionMiddle");         }            break;        case DDAttributedStringImagePositionRight:        {            [superAttrStr insertAttributedString:imageAttStr atIndex: superAttrStr.length];         }            break;    }        return superAttrStr.copy;}复制代码

只有这么几行代码,只是为了调整图片与文字的大小.

• 结果 竟然没有释放