UISegmentedControl 分段控制器选中切换

//默认选中

_segment.selectedSegmentIndex = 0;

//选择时的颜色和字体   

[_segment setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:18],NSForegroundColorAttributeName: [UIColor blueColor]} forState:UIControlStateSelected];

//未选择时的颜色和字体

[_segment setTitleTextAttributes:@{NSFontAttributeName:[UIFont systemFontOfSize:15],NSForegroundColorAttributeName: [UIColor blackColor]} forState:UIControlStateNormal];

//区分在那个选项

[_segment addTarget:self action:@selector(SegClick:) forControlEvents:UIControlEventValueChanged];

if (seg.selectedSegmentIndex == 0)

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