objective-c - 改变数组循环的速度？Objective-C

Question

我有这个代码

NSArray *food = [NSArray arrayWithObjects:@"Apples:",@"bacon",@"corn",@"donuts",@"elfs",@"fidge",nil];

for(int i = 0; i<6; i++){
    NSLog(@"item at index %i is %@",i,[food objectAtIndex:i]);

}

现在它们都立即打印到控制台。我怎样才能使变量降低或提高他们记录的速度？我是 Objective-C 的新手，非常感谢您的帮助！:)

Answer 1

NSArray *food = [NSArray arrayWithObjects:@"Apples:",@"bacon",@"corn",@"donuts",@"elfs",@"fidge",nil];

// the number of seconds to wait between printing each item
double secondsToSleep = 1.0;

for(int i = 0; i<6; i++){
    [NSThread sleepForTimeInterval:secondsToSleep];
    NSLog(@"item at index %i is %@",i,[food objectAtIndex:i]);
}

Answer 2

NSThread 上有一个 sleepForTimeInterval: 方法，它可能会满足您的需求。文档在这里。

编辑：抱歉，对于 Objective-C 新手，您只需输入如下内容：

[NSThread sleepForTimeInterval:0.01];

Answer 3

见sleep()功能。