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Swift是OO(面向?qū)ο螅┑恼Z(yǔ)言疾宏,所以少不了方法和屬性的重載等特性稍刀,程序只能在運(yùn)行時(shí)來(lái)確定具體的方法或?qū)傩詠?lái)間接調(diào)用或間接訪問(wèn),這就叫做動(dòng)態(tài)派...
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