避免UIView觸摸延遲

Question

我在我的應用程序中使用UIView的子類。當用戶觸摸視圖時，我需要獲取點的座標;爲此，我正在使用：

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

    currentPoint=[[touches anyObject]locationInView:self]; 

} 

它有一些延遲。任何人都可以給我解決方案，立即獲得積分？謝謝你們。

- (id)initWithFrame:(CGRect)frame { 

    self = [super initWithFrame:frame]; 
    if (self) { 
     // Initialization code. 
     self.frame=frame; 
     rect=[[NSMutableArray alloc] initWithCapacity:1]; 
     currentPointsList=[[NSMutableArray alloc]initWithCapacity:1]; 
    } 
    return self; 
} 

---

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

    UITouch *touch = [touches anyObject]; 

    firstTouchedPoint = [touch locationInView:self]; 
    NSLog(@"the firstTouched point is %"); 
    for (int i=0; i<[rect count]; i++) { 
    if(CGRectContainsPoint([[rect objectAtIndex:i]CGRectValue], firstTouchedPoint)){ 

     CGRect firstLineRect = CGRectMake(firstTouchedPoint.x, 
            [[rect objectAtIndex:i]CGRectValue].origin.y, 
            [[rect objectAtIndex:i]CGRectValue].size.width-firstTouchedPoint.x+[[rect objectAtIndex:i]CGRectValue].origin.x, 
            [[rect objectAtIndex:i]CGRectValue].size.height); 
     UIImageView *firstLine=[[UIImageView alloc]initWithFrame:firstLineRect]; 
     firstLine.backgroundColor=[[UIColor blueColor]colorWithAlphaComponent:0.3f]; 
     [self addSubview:firstLine]; 
     break; 
    } 

} 

Answer 1

如果您正在使用一個UIScrollView有延遲觸及屬性（delaysContentTouches）。你可能想確定這是否。