How to change some text colors in multiple colored UITextView

Question

A UITextView has some text with black color and some with red color. I want to change only the black color to white color. I have no idea how to select only the black color and change it to white color.

You can check how to enumerate https://stackoverflow.com/questions/56021846/toggle-selectedrange-attributes-in-uitextview/56056187#56056187 https://stackoverflow.com/questions/56102521/change-only-fontsize-of-nsattributedstring it's on the font attribute, but you should get the idea. — Larme, May 14 '19 at 15:28

score 0 · Accepted Answer · answered May 14 '19 at 15:29

Use method enumerateAttribute:inRange:options:usingBlock:

Example Obj-C:

NSMutableAttributedString *string = [[NSMutableAttributedString alloc]initWithString:@"Test Attributed String"];
[string addAttribute:NSStrokeColorAttributeName value:[UIColor redColor] range:NSMakeRange(3, string.length-3)];
[string enumerateAttribute:NSStrokeColorAttributeName inRange:NSMakeRange(0, string.length) options:NSAttributedStringEnumerationReverse usingBlock:^(id  _Nullable value, NSRange range, BOOL * _Nonnull stop) {
    // value is color
}];

How to change some text colors in multiple colored UITextView

1 Answers1