Question

I am setting the font property of a label using the fontWithSize: method and while it works fine in iOS 5, iOS 4.3 I am getting an exc_bad_access error. Here is my code:

UILabel *headerText = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, tableView.bounds.size.width - 10, 42)];

headerText.text = [tableView.dataSource tableView:tableView titleForHeaderInSection:section];


headerText.font = [[UIFont alloc] fontWithSize:8];

Again, this code works perfectly in iOS 5, but crashes as the last line in 4.3. I checked the Apple API docs and fontWithSize: as well as the font property of a UILabel have both been around since iOS 2. Is there anything else wrong here?

Answer 1

If you use alloc to initial, the method usually begins with init.

fontWithSize : is not used to initial.

Returns a font object that is the same as the receiver but which has the specified size instead.

It means that you should call it using an existing font instance.
For example:

    UIFont *font = [UIFont systemFontOfSize:12];
    UIFont *newFont = [font fontWithSize:24];

But if you want to initial an instance, you need call the class method or instance method beginning with init.