Swift 3.0Runtime 获取系统class属性

因为有写API有改动，所以小写一下，如果以前的一些方法在Swift3.0里没发用了，可以去下面这个官方的API变动文档去看看

https://developer.apple.com/library/prerelease/content/releasenotes/General/watchOS30APIDiffs/Swift/Swift.html

var count : UInt32 = 0;        
    let list = class_copyPropertyList(UIPageControl.classForCoder(),&count)
    for i in 0..<count
    {
        let aa = list?[Int(i)]
        let cc = property_getName(aa)
      
//下面这个方法就是新加的，删掉了以前的
//String.fromCString(_: UnsafePointer<CChar>) -> String? [static]
        let name = String.init(cString:cc!)

//这样写也是同样的效果
        let name1 = String.init(utf8String : cc!)!
        print(name)
        print(name1)
            }