Swift provides a high-performance、Compatible with Unicode strings to achieve，It has also become a part of its own standard library。In Swift 2 middle， String Type no longer comply with CollectionType protocol，Time [cray[……]
2.0
WWDC conference in June this year on, Apple released Swift 2.0 Programming language。This new version has improved performance，The new API error control and detection support class availability。And improved Apple SDK platform API to make it more native to Swift。
Source
For new features for，Also worth noting is that Apple will open later this year Swift[……]