【发布时间】:2010-10-20 16:35:00
【问题描述】:
我正在编写我的第一个带有动画的应用程序,但遇到了一些麻烦。我有一个 ViewController,它以编程方式创建一定数量的 UIView 添加为子视图。
现在,当我触摸其中一个视图时,我想将其向一个方向(上、右、下、左)移动,但前提是在这个方向上没有另一个视图。 问题是:如果在一个方向上有另一个视图,我怎么能问 ViewController?我试过了:
// In the view controller:
+ (id)sharedInstance {
static id master = nil;
@synchronized(self)
{
if (master == nil)
master = [self new];
}
return master;
}
...
// In the UIView subclass
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
[[MyViewController sharedInstance] touchesEnded:touches withEvent:event launchedBy:numero.text];
}
...
// Finally the method
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event launchedBy:(NSString *)launcher
{
CGPoint coord = [[cells objectAtIndex:[launcher intValue]] coordinate];
[NumberView beginAnimations:@"MoveAndStrech" context:nil];
[NumberView setAnimationDuration:1];
[NumberView setAnimationBeginsFromCurrentState:YES];
if([touches count] == 1) {
if ( ![map objectForKey:[NSString stringWithFormat:@"%d+%d",coord.x+64,coord.y]] ) {
NSNumber *isAvailable = [NSNumber numberWithBool:NO];
[map setValue:isAvailable forKey:[NSString stringWithFormat:@"%d+%d",coord.x,coord.y]];
NSLog(@"Dati: %@ all'indice: %d",[cells objectAtIndex:[launcher intValue]-1], [launcher intValue]-1);
[[cells objectAtIndex:[launcher intValue]] setCenter:CGPointMake((coord.x+64)/2, coord.y)]/* = CGPointMake((coord.x+64)/2, coord.y)*/;
isAvailable = [NSNumber numberWithBool:YES];
[map setValue:isAvailable forKey:[NSString stringWithFormat:@"%d+%d",coord.x+64,coord.y]];
}
}
[NumberView commitAnimations];
}
但是 NSLog(@"dati ... 给出 (null)。 我该怎么做?
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