swift代码
let delayTime = dispatch_time(DISPATCH_TIME_NOW, Int64(1 * Double(NSEC_PER_SEC)))
let queue : dispatch_queue_t = dispatch_get_main_queue()
dispatch_after(delayTime, queue) {
//execute code...
}
OC版
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
//execute code...
});
