以编程方式更改UISlider的范围
如何以编程方式设置UISlider的最小最大范围?
例如(虚拟代码)
UISlider* slider = [[UISlider alloc] init]; slider.min = -3; slider.max = 3;
编辑:
所以我有以下内容:
sl.minimumValue = 5; NSLog(@"MIN VAL: %d", sl.minimumValue);
这不起作用,我仍然记录值0.这是因为我在界面构建器中设置了值吗?
就这个。
UISlider* slider = [[UISlider alloc] init]; slider.minimumValue = -3.0f; slider.maximumValue = 3.0f;
// Add a frame where you want to place the slider. This will place it at (x,y) = 0,0 with a height of 10 and width of 200 CGRect frame = CGRectMake(0.0, 0.0, 200.0, 10.0); // sliderAction will respond to the updated slider value UISlider *slider = [[UISlider alloc] initWithFrame:frame]; [slider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged]; // Set minimum and maximum value slider.minimumValue = 0.0; slider.maximumValue = 50.0; slider.continuous = YES; // Initial value slider.value = 25.0; // Add slider to view [self.view addSubview:slider];