我有一个void方法,这个方法会将UIView
设置为一个点,在UIView
应该animate
到另一个点的特定时间之后,我正在尝试使用[NSTimer scheduledTimerWithTimeInterval:duration target:self selector:@selector(METHOD) userInfo:nil repeats:NO];
但看起来我无法使用Arguments
执行无效操作。我需要执行这个空白:
-(void)showNotificationViewWithText:(NSString *)title andTextColor:(UIColor *)titleTintColor andNotificationBackGroundColor:(UIColor *)backGroundColor andDuration:(float)duration direction:(BOOL) up:
或者有人有更好的想法在延迟后将UIView移动到不同的点吗?
答案 0 :(得分:3)
GCD功能是一种非常灵活的方法,可以在延迟一段时间后执行任何代码
dispatch_after()
。它需要一个块作为你可以调用的参数
具有任意参数和返回类型的任何方法:
double delayInSeconds = 2.0;
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
// do whatever you want, e.g.
[self showNotificationViewWithText: ....];
});
(提示:只需在Xcode编辑器中键入“dispatch_after”,然后让自动完成功能完成!)
答案 1 :(得分:2)
您可以使用NSObject类的performSelector:withObject:afterDelay:方法。
NSDictionary *obj = [[NSDictionary alloc] initWithObjectsAndKeys:title,@"title",titleTintColor,@"titleTintColor",backGroundColor,@"backGroundColor",[NSNumber numberWithFloat:duration],@"duration",[NSNumber numberWithBool:up],@"up" nil];
[self performSelector:@selector(showNotificationViewWithText:) withObject:obj afterDelay:2.0];
-(void)showNotificationViewWithText:(NSDictionary *)arg
{
NSDictionary *title = [arg objectForkey:@"title"];
UIColor *titleTintColor = [arg objectForkey:@"titleTintColor"];
UIColor *backGroundColor = [arg objectForkey:@"backGroundColor"];
float duration = [arg objectForkey:@"duration"];
BOOL up = [arg objectForkey:@"up"];
//code
}
答案 2 :(得分:0)
当调度计时器只是通过nstimer争论时它很简单。试试这样: -
[NSTimer
scheduledTimerWithTimeInterval:duration
target:self selector:@selector(METHOD:)
userInfo:nil repeats:NO];
-(void)METHOD:(NSTimer*) timer
{
// your code
}
答案 3 :(得分:0)
或者有人有更好的想法将UIView移动到不同的点 过了一会儿?
如果为视图设置动画,则可以在动画方法中指定延迟
+ (void)animateWithDuration:(NSTimeInterval)duration delay:(NSTimeInterval)delay options:(UIViewAnimationOptions)options animations:(void (^)(void))animations completion:(void (^)(BOOL finished))completion