UISegmented用法

ios

UISegmentedControl

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NSArray *subjectArray = [[NSArray alloc]initWithObjects:@"英语",@"语文",@"数学",nil];//初始化UISegmentedControl的数组
//UISegmentedControl
   UISegmentedControl *subjectSegmented = [[UISegmentedControl alloc]initWithItems:subjectArray];//数据填充
   subjectSegmented.frame = CGRectMake(0, 0, DF_WIDTH/2, 44);
   subjectSegmented.segmentedControlStyle = UISegmentedControlStylePlain;//设置样式（总共有四种样式）
   for(int i=0; i<[subjectArray count]; i++){//设置当前默认选中的选项
       if([self.subject isEqualToString:self.subjectArray[i]]){
           subjectSegmented.selectedSegmentIndex = i;
           break;
       }
   }
   self.navigationview.tintColor = [UIColor colorWithHexString:@"#ff393a"];//边框和字体颜色
   [self.navigationview addSubview:self.subjectSegmented];
   [subjectSegmented addTarget:self action:@selector(changeSubject:) forControlEvents:UIControlEventValueChanged];//点击动作
   [subjectSegmented mas_makeConstraints:^(MASConstraintMaker *make) {//这里使用了相对布局,可以忽略
       make.centerX.equalTo(self.navigationview);
 		make.centerYWithinMargins.equalTo(self.navigationview).with.offset(padding.top);
   }];
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//切换科目
-(void)changeSubject:(id)sender{
    UISegmentedControl* control = (UISegmentedControl*)sender;//利用UISegmentedControl来控制选中选项时的操作
    switch (control.selectedSegmentIndex) {
        case 0:
            self.subjectSegmented.selectedSegmentIndex = 0;
            self.navTitle = [self.subjectArray[0] stringByAppendingString:@"课本"];
            break;
        case 1:
            self.subjectSegmented.selectedSegmentIndex = 1;
            self.navTitle = [self.subjectArray[1] stringByAppendingString:@"课本"];
            break;
        case 2:
            self.subjectSegmented.selectedSegmentIndex = 2;
            self.navTitle = [self.subjectArray[2] stringByAppendingString:@"课本"];
            break;
        default:
            break;
    }
    //以下是其他操作，比如数据更新之类的
    [self setSubjectEdition];
    [self.rightButton setTitle:self.edition forState:(UIControlStateNormal)];
    [self initData];
    [self.tableView reloadData];
}