I have java code which looks something like this:
for(int i=0;i<codeWord.length;i++) {
codeWord[i] = cw_bArray;
}
here the codeword is NSDATA & cw_barray is NSMutableArray and in Objective c i am doing
for(int i=0;i<codeword.length;i++) {
[codeword objectAtIndex:i] =[cw_bArray mutableCopy];
}
but it is popping a error like this
Assigning to 'readonly' return result of an objective-c message not allowed
Praven S solution works fine if you are looking for adding object to your array. The java code seems more like a replacing object in the array by new ones. In order to achieve that you should use: [codeword replaceObjectAtIndex:i withObject:[cw_bArray mutableCopy]];
Like he said, objectAtIndex is a getter method. Hence you cannot assign a value to the method result. It would have no sense. Basically what you wrote is give me the i object of the array but you know what? Let say this object is another one.
for(int i=0;i<codeWord.length;i++){ switch (codeWord[i]) but if the give same in objective c it is popping error Subscripted value is not an array, pointer, or vector where codeword is NSData
codeWord[i] you have to use [codeWord objectAtIndex:i] to access the element at index i. You also could use: for(ElementType element in codeWord) { switch (element) ... } The thing is, in Objective C you cannot use switch on other expression than resulting a number. Hence you cannot perform the switch directly on the element if it is not a number[codeword insertObject:[cw_bArray mutableCopy] atIndex:i];
should do the trick for you.
Basically objectAtIndex returns a read only copy which cannot be assigned to another object. What you need to do is replace the entire object at that index with your new object.
