ios - NSTextAttachment doesn't show on CATextLayer -

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i tried on uitextview work. image left blank when use catextlayer.

anyone tried before?

here code tried in uiview drawrect

nstextattachment* attachment = [nstextattachment new]; attachment.image = [uiimage imagenamed:@"rainbow.png"]; nsattributedstring* imagestring = [nsattributedstring attributedstringwithattachment:attachment]; nsdictionary * attribute = @{nsfontattributename: [uifont fontwithname:@"helvetica" size:12]}; nsmutableattributedstring *speechstring = [[nsmutableattributedstring alloc] initwithstring: @"hi" attributes:attribute]; [speechstring insertattributedstring:imagestring atindex:1]; [speechstring appendattributedstring:imagestring];

then add catextlayer

catextlayer * speechtextlayer = [catextlayer layer]; [speechtextlayer setstring:speechstring]; [speechtextlayer setframe:self.bounds]; [speechtextlayer setbackgroundcolor:[uicolor whitecolor].cgcolor]; [self.layer addsublayer:speechtextlayer];


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