GCD:用 Swift 编写的 Grand Central Dispatch 的包装器

大中华区 用 Swift 编写的 Grand Central Dispatch 的包装器。 例子 GCD // submit your code for asynchronous execution on a global queue with high priority gcd. async (. High ) { // your code } // or with main thread gcd. async (. Main ) { // your code } gcd. async (. Default ) { // your code gcd. async (. Main ) { // code run on main thread } } // with your custom queue let myQueue = G