UIButton not being added to custom UIView Objective C - objective-c

Question

I am creating a custom UIView called DropDown that contains a button. In the .h file I initialize the button and in the constructor of the UIView, I add it to the frame and set the title. Here is the constructor:
-(id) initWithFrame:(CGRect)frame title1:(NSString*)text1{
self = [super initWithFrame:frame];
if (self){
_button1 = [UIButton buttonWithType:UIButtonTypeCustom];
[_button1 setTitle:text1 forState:UIControlStateNormal];
_button1.frame = CGRectMake(10, 10, 50, 20);
[self addSubview:_button1];
}
return self;
}
In my ViewController viewDidLoad I am instantiating a DropDown object as follows:
_dropDown = [[DropDown alloc] initWithFrame:_dropDown.frame title1:#"Title"];
The _dropDown object is an IBOutlet and I hook it up on the view controller. When I run the application, no button is shown and I am unsure why. Any help would be much appreciated.

Answer 1

This statement
_dropDown = [[DropDown alloc] initWithFrame:_dropDown.frame title1:#"Title"];
references _dropDown.frame which is nil at this point because _dropDown hasn't been assigned yet. I would suggest creating the frame explicitly more like this:
_dropDown = [[DropDown alloc] initWithFrame:CGRectMake(10, 10, 50, 20) title1:#"Title"];
(you'll need to figure out the sizing for CGRectMake)