Question

所以我有一个弹奏和弦的吉他应用程序，就像autoharp一样。我创建了下面的UIView类，当用户的手指在字符串上滑动时，将滑动变成一个弹拨。

#import "swipetest.h"


@implementation swipetest

@synthesize eStringButton, aStringButton, dStringButton, gStringButton, bStringButton, ehStringButton;



- (void)viewDidLoad {
[NSThread detachNewThreadSelector:@selector(isolateStrums) toTarget:self withObject:nil]; }



- (void)isolateStrums {  

NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];  
[self performSelectorOnMainThread:@selector(touchesMoved) withObject:nil waitUntilDone:NO];  
[pool release];  

}  
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{

CGPoint location = [[touches anyObject] locationInView:self];
UIView *subview = [self hitTest:location withEvent:event];
if ([subview isKindOfClass:[UIButton class]])
{



 if(CGRectContainsPoint(eStringButton.frame, location)) {
     [eStringButton setHighlighted:YES];
 [eStringButton sendActionsForControlEvents:UIControlEventTouchDown];
 [NSTimer scheduledTimerWithTimeInterval:strumDelay target:self selector:@selector(ETimer) userInfo:nil repeats:NO];

    }

  else {

      [eStringButton setHighlighted:NO];


  }


  if(CGRectContainsPoint(ehStringButton.frame, location)) {
      [ehStringButton setHighlighted:YES];
      [ehStringButton sendActionsForControlEvents:UIControlEventTouchDown];

  }
  else {

      [ehStringButton setHighlighted:NO];

  }


if(CGRectContainsPoint(bStringButton.frame, location)) {
      [bStringButton setHighlighted:YES];
      [bStringButton sendActionsForControlEvents:UIControlEventTouchDown];

  }
else {

     [bStringButton setHighlighted:NO];


}

 if(CGRectContainsPoint(aStringButton.frame, location)) {
    [aStringButton sendActionsForControlEvents:UIControlEventTouchDown];
        [aStringButton setHighlighted:YES];

    }
else {

    [aStringButton setHighlighted:NO];


}


 if(CGRectContainsPoint(dStringButton.frame, location)) {
        [dStringButton setHighlighted:YES];

    [dStringButton sendActionsForControlEvents:UIControlEventTouchDown];

    }
else {
    [dStringButton setHighlighted:NO];



}
     if(CGRectContainsPoint(gStringButton.frame, location)) {
       [gStringButton setHighlighted:YES];
        [gStringButton sendActionsForControlEvents:UIControlEventTouchDown];
    }
    else {
        [gStringButton setHighlighted:NO];



    }




}       

}





- (void)dealloc {
[eStringButton release];
[aStringButton release];
[bStringButton release];
[gStringButton release];
[dStringButton release];
[ehStringButton release];



[super dealloc];
}



@end

问题在于，即使在正常的速度下，视图也能快速点击“命中”。如何减慢界面响应？我不能使用任何暂停NSthread的命令。有没有办法在收到UIControlEventTouchDown消息之后的一段预定时间内禁用UIButton，比如0.1秒？我应该为每个字符串创建单独的线程并暂停这些线程吗？现在它有点工作，但很容易变成“矩阵”听起来口吃的吉他。不好。

Answer 1

有没有办法禁用UIButton 在预定的一段时间内收到后比如UIControlEventTouchDown消息持续0.1秒？

当然 - 您可以使用NSTimer更改按钮的.userInteractionEnabled属性。只要您检测到触碰，就将其设置为“NO”，并在设定数量/分数秒后触发定时器将其设置回“YES”。

在iPhone上创建逼真的Strum？

1 个答案: