Question

When I add UIColor objects into array i got Thread1: Program received signal: “SIGBRT” this error.

 NSMutableArray *array =[[NSMutableArray alloc] init];
        UIColor *color1,*color2, *color3,*color4;
        color1 = [UIColor blueColor];
        color2 = [UIColor colorWithHue:0.5 
                            saturation:0.1 
                            brightness:0.2
                                 alpha:1.0];
        color3 = color2;
        [array addObject:color1];//No Problem
        [array addObject:color2];//No Problem
        [array addObject:color3];//No Problem
        [array addObject:color4];//Problem is here.....

When I add first three objects into array there is no problem. But when i add last object i get error. What is the problem in this code? Should i assign any thing to fourth object(color4) like first three objects? Is it necessary? Why?…

Please suggest me with example. Thanks in advance.

Answer 1

color4 is not initialized and you try to insert nil in your array. Initialize color4 like the other colors.