Apple warned about supply-chain problems when it disclosed its latest results . Photograph by Greg Baker/AFP/Getty Images China loves the Apple iPhone . That is a combination that has the potential to drive better-than-expected financial results for Apple ’s June quarter . The iPhone has come to dominate Apple ’s financial performance, accounting for 55% of revenue in the first half of the September 2022 fiscal year, not counting any contribution from the App Store or other services revenue . China , meanwhile, represented 20% of Apple ’s (ticker: AAPL) revenue in the same period. Apple shares have slumped about...