Deep cloning multidimensional arrays in Java...?

Question

When I try to dismiss a UIImageView with

- (void)handleGesture:(UIGestureRecognizer *)gestureRecognizer {
    CGPoint p = [gestureRecognizer locationInView:self.view];
    if (CGRectContainsPoint(_tutorial.frame, p)) {
        _tutorial.hidden = YES;

        _transButton.enabled = YES;
        _transButtonEng.enabled = YES;
        _infoButton.enabled = YES;
        _textfield.enabled = YES;
    }
    else {
        NSLog(@"HOW IS THIS EVEN POSSIBLE?!?!?"); //The CGRect is the whole screen
    }
}

I get this error message:

MacBook-Pro.local APP_NAME[97086] : CGContextSetFillColorWithColor: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

It also repeats the same message with CGContextSetFillColorWithColor: replaced by:

CGContextSetStrokeColorWithColor:
CGContextSaveGState:
CGContextSetFlatness:
CGContextAddPath:
CGContextDrawPath:
CGContextRestoreGState:
CGContextSaveGState:
CGContextSetFlatness:
CGContextAddPath:
CGContextDrawPath:
CGContextRestoreGState:
CGContextSetFillColorWithColor:
CGContextSetStrokeColorWithColor:
CGContextSetFillColorWithColor:
CGContextSetStrokeColorWithColor:
CGContextGetBlendMode:
CGContextSetBlendMode:
CGContextFillRects:
CGContextSetBlendMode:
CGContextSetFillColorWithColor:
CGContextSetStrokeColorWithColor:
CGContextGetBlendMode:
CGContextSetBlendMode:
CGContextFillRects:
CGContextSetBlendMode:
CGContextSetFillColorWithColor:
CGContextSetStrokeColorWithColor:
CGContextGetBlendMode:
CGContextSetBlendMode:
CGContextFillRects:
CGContextSetBlendMode:

I am using the latest version of Xcode 5 and iOS 7.0.3.

How would I fix these errors?

Solution 1

You might want to check out the java.util.Arrays.deepEquals and java.util.Arrays.equals methods.

I'm afraid the equals method for array objects performs a shallow comparison, and does not properly (at least for this case) compare the inner Character arrays.

Solution 2

equals() method on arrays is the one declared in Object class. This means that it will only returns true if the object are the same. By the same it means not the same in CONTENT, but the same in MEMORY. Thus equals() on your arrays will never return true as you're duplicating the structure in memory.

Solution 3

A test for equality original.equals(clone); spits out a false. Why? :|

thats because you are creating a new array with new Character[original.length][];.

Arrays.deepEquals(original,clone) should return true.

Comments

[Michael Dautermann]

In the code that you've copied to your question, you should also include the method / function that has the call to "CGContextSetFillColorWithColor".

[ZuluDeltaNiner]

@MichaelDautermann I don't call any of these anywhere; I use Interface Builder

[Rob]

I don't know if it's related, but there are known iOS 7 bugs that cause this sort of behavior: stackoverflow.com/questions/19599266/…

[ZuluDeltaNiner]

I have seen these, but I was wondering if there was a fix for when UIGestureRecognizer/UIImageView cause the errors

[ZuluDeltaNiner]

Could you provide an example? I have much trouble reading most types of API Docs.

[Venkata Raju]

This technique works for multidimensional arrays. Just use array in place of this