"Swift" text mix, insert picture in iOS development in TextField or TextView

In iOS development, we typically enter text in TextField or TextView. When we need to insert a picture, it's actually very simple.

We need to take advantage of the attributed text of the Textfield,textview, insert the picture as an attachment

The steps are as follows: (in TextView, the same in OC)

• Create attachments while setting the font size of TextView (or set in storyboard)

  1         // Set Font 2         Textview.font = uifont.systemfontofsize (3)         // Create attachment 4 let         attachment = Nstextattachment ()
  
  

• Set the Picture property of the attachment to the picture you want to insert, convert the attachment to attributed text, and set the size of the attachment

1.  1  //  set photos of attachments  2  attachment.image = UIImage (picture name )  3  //  Set the size of the attachment (-4 This number can be adjusted according to the actual situation, the width of the height can also set their own, where the font size for reference)  4  attachment.bounds = CGRectMake (0 ,-4   5   Converts an attachment to the attributed text of the nsattributedstring type  6  let Attstr = nsattributedstring (Attac hment:attachment) 

    

• Gets the text in the current TextView, turns it into a variable text, records the position of the cursor, and inserts the attributed text in the previous step

1. 1        // gets all the text of the TextView and turns it into a variable text 2         var mutablestr = nsmutableattributedstring (attributedString:textView.attributedText)3         // get the current cursor position 4         Let Selectedrange = textview.selectedrange5         // Insert text 6         mutablestr.insertattributedstring (ATTSTR, atIndex:selectedRange.location)

• Sets the properties of the new variable text and calculates the new cursor position

1. 1         // set font properties for variable text 2         Mutablestr.addattribute (Nsfontattributename, Value:UIFont.systemFontOfSize (), Range:nsmakerange (0  , mutablestr.length))3         // Remember again the position of the new cursor 4         Let Newselectedrange = Nsmakerange (selectedrange.location+10)

• Assign the new text to TextView and restore the cursor position

• 1         // re-assigning text to a value 2         Textview.attributedtext = mutablestr3         // The position of the recovery cursor (after the execution of the code above, the cursor will move to the last face) 4         Textview.selectedrange = Newselectedrange

"Swift" text mix, insert picture in iOS development in TextField or TextView