[customSlider addTarget:self action:@selector(sliderDown:) forControlEvents:UIControlEventTouchDown]; 
 
[customSlider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventTouchUpInside]; 
 
 
 
- (void)sliderDown:(id)sender 
{ 
 
    sliderused = NO; 
 
} 
 
- (void)sliderAction:(id)sender 
{ 
    if(sliderused){ 
    return; 
} 
 
sliderused = YES; 
 
//Your Code Here 
} 

 

轉載：http://stackoverflow.com/questions/1063158/uislider-returns-two-touch-up-inside-events-why-does-that-happen

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