NewsViewController 頁(yè)面 import UIKit let scrWidth = UIScreen.main.bounds.s...

1.數(shù)據(jù)類型在內(nèi)存中存儲(chǔ): 1G = 1024MB 1MB = 1024KB 1KB = 1024B(字節(jié)) 1B =8bit(位) sizeo...