Question

我正在尝试在iphone应用中的for循环中设置延迟。基本上我会有一个带有一些动作的for循环，我希望每个动作之间有1秒的延迟：

for loop {action 1，delay 1sec，action 2，delay 1sec，action 3，delay 1sec}

我该怎么编码？

Answer 1

for (loop) {

    [self action1];
    [self performSelector:@selector(action2) withObject:nil afterDelay:1.0];
    [self performSelector:@selector(action3) withObject:nil afterDelay:1.0];
}

希望这就是你要找的东西!!

修改

试试这个..它将完成当前方法的运行并转到下一个。

for (loop) { [self performSelectorOnMainThread:@selector(action1) withObject:nil waitUntilDone:YES]; [self performSelectorOnMainThread:@selector(action2) withObject:nil waitUntilDone:YES]; [self performSelectorOnMainThread:@selector(action3) withObject:nil waitUntilDone:YES]; }

Answer 2

这不涉及for循环，但会采取一系列操作并以越来越多的延迟执行它们。

NSArray *selectorStrings = @[ @"action1", @"action2", @"action3" ];
[selectorStrings enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) {
    SEL selector = NSSelectorFromString((NSString *)obj);
    NSTimeInterval delay = (NSTimeInterval)idx;
    [self performSelector:selector withObjet:nil afterDelay:delay];
}];

希望这有帮助！如果您有疑问，请告诉我。

for循环中的延迟 - iPhone

2 个答案: