NewsViewController 页面 import UIKit let scrWidth = UIScreen.main.bounds.size.width // 宽度...
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NewsViewController 页面 import UIKit let scrWidth = UIScreen.main.bounds.size.width // 宽度...
1.数据类型在内存中存储: 1G = 1024MB 1MB = 1024KB 1KB = 1024B(字节) 1B =8bit(位) sizeof()函数用来获取数据类型在当...