UISlider增加触动区域

- (CGRect)thumbRectForBounds:(CGRect)bounds trackRect:(CGRect)rect value:(float)value
{
    rect.origin.x = rect.origin.x - 10 ;
    rect.size.width = rect.size.width +20;
    return CGRectInset ([super thumbRectForBounds:bounds trackRect:rect value:value], 10 , 10);
}

 

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