简单实现UISlider每100固定值滑动

1.在初始化UISlider的懒加载里面设置如下：

_numbers = [[NSMutableArray alloc] init];
        for (int i = 0; i <= (5000-2000)/100; i++) {
            [_numbers addObject:@(i * 100)];
        }
        // These number values represent each slider position
        // slider values go from 0 to the number of values in your numbers array
        NSInteger numberOfSteps = ((float)[_numbers count] - 1);
        _slider.maximumValue = numberOfSteps;
        _slider.minimumValue = 0;

        // As the slider moves it will continously call the -valueChanged:
        _slider.continuous = YES; // NO makes it call only once you let go

2.再valueChanged方法里面如下设置：

    NSUInteger index = (NSUInteger)(slider.value + 0.5);
    [slider setValue:index animated:NO];

3.在显示界面将slider的值加上最小值就ok了