UISegmentedControl所选索引总是0？

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问题描述

我有一个UISegmentedControl有6段，我在Interface Builder中创建。我调用以下方法对值改变：

I have a UISegmentedControl that has 6 segments which I created in Interface Builder. I am calling the following method on value changed:

-(IBAction)segmentedChartButtonChanged:(id)sender
{
    switch (self.segmentedChartButton.selectedSegmentIndex) {
        case 0:
            NSLog(@"5d selected. Index: %d", self.segmentedChartButton.selectedSegmentIndex);
            break;
        case 1:
            NSLog(@"3m selected. Index: %d", self.segmentedChartButton.selectedSegmentIndex);
            break;
        default:
            break;
    }
}

每当我更改段时， selectedSegmentIndex始终为0 。为什么是这样？

Whenever I change the segments, the selectedSegmentIndex is always 0. Why is this?

推荐答案

很可能是 IBOutlet isn连接。检查。您还可以使用传递给方法的 sender 。

It is very likely that the IBOutlet isn't connected. Check that. You can also use the sender that is passed to the method.

UISegmentedControl * segmentedControl = (UISegmentedControl *)sender;
switch (segmentedControl.selectedSegmentIndex) {
    ....

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