for-in 循環(huán)迭代項(xiàng)目,如數(shù)字范圍,數(shù)組中的項(xiàng)目,或字符串中的字符集:
for-in 循環(huán)在 Swift 編程語(yǔ)言的語(yǔ)法:
for index in var { statement(s) }
import Cocoa var someInts:[Int] = [11, 22, 33] for item in someInts { println( "Value of index is \(item)") }
當(dāng)執(zhí)行上面的代碼,它產(chǎn)生以下結(jié)果:
Value of index is 11 Value of index is 22 Value of index is 33