If the latex is \sqrt only, it will crash on getNextCharacter function call. We modify the sqrt command to check the array index and length by hasCharacters function in MTMathListBuilder.m
(MTMathAtom) atomForCommand:(NSString) command
{
......
} else if ([command isEqualToString:@"sqrt"]) {
// A sqrt command with one argument
MTRadical* rad = [MTRadical new];
if ([self hasCharacters]) {
unichar ch = [self getNextCharacter];
if (ch == '[') {
// special handling for sqrt[degree]{radicand}
rad.degree = [self buildInternal:false stopChar:']'];
rad.radicand = [self buildInternal:true];
} else {
[self unlookCharacter];
rad.radicand = [self buildInternal:true];
}
}
return rad;
If the latex is \sqrt only, it will crash on getNextCharacter function call. We modify the sqrt command to check the array index and length by hasCharacters function in MTMathListBuilder.m