(analysts say Apple's iPhone and Mac may face demand pressure in the second half of the year.) according to Science and Technology Innovation Board Daily on the 14th, UBS analyst David Vogt said that iPhone and Mac may be under demand pressure in the second half of this year; at the same time, the growth of services such as App Store, Apple Music, Apple TV and other subscription products is also slowing. IPhone is the largest source of revenue in Apple's product line, while services is the second largest source of revenue.