Uitextview Custom placeholder Function: Write the text with a label, and then hide the label when it detects that the length is not 0

-(BOOL) TextView: (Uitextview *) TextView Shouldchangetextinrange: (nsrange) Range Replacementtext: (NSString *) text

{

if ([text isequaltostring:@ "\ n"]) {//detected "done"

[TextView resignfirstresponder];//release keyboard

return NO;

}

if (AdviceMsg.text.length = = 0) {//textview length is 0

if ([Text isequaltostring:@ ""]) {//To determine if the DELETE key

Labeltext.hidden = no;//hidden text

} else {

Labeltext.hidden = YES;

}

} else {//textview length is not 0

if (adviceMsg.text.length = = 1) {//textview length is 1

if ([Text isequaltostring:@ ""]) {//To determine if the DELETE key

Labeltext.hidden = NO;

} else {//Is not deleted

Labeltext.hidden = YES;

}

} else {//length is not 1 time

Labeltext.hidden = YES;

}

}

return YES;

}

Uitextview Custom placeholder Function: Write the text with a label, and then hide the label when it detects that the length is not 0