077设置分段卡某个选项不可用

效果如下：

ViewController.h

1 #import <UIKit/UIKit.h>
2
3 @interface ViewController : UIViewController
4 @end

ViewController.m

 1 #import "ViewController.h"
 2
 3 @interface ViewController ()
 4 - (void)layoutUI;
 5 @end
 6
 7 @implementation ViewController
 8
 9 - (void)viewDidLoad {
10     [super viewDidLoad];
11
12     [self layoutUI];
13 }
14
15 - (void)didReceiveMemoryWarning {
16     [super didReceiveMemoryWarning];
17     // Dispose of any resources that can be recreated.
18 }
19
20 - (void)layoutUI {
21     UISegmentedControl *smtCContentOffset = [[UISegmentedControl alloc] initWithItems:@[@"First", @"Second", @"Third"]];
22     smtCContentOffset.tintColor = [UIColor colorWithRed:1.000 green:0.434 blue:0.469 alpha:1.000];
23     smtCContentOffset.selectedSegmentIndex = 2;
24     smtCContentOffset.momentary = YES;
25     smtCContentOffset.center = self.view.center;
26
27     NSLog(@"分段卡的选项个数＝%lu", (unsigned long)[smtCContentOffset numberOfSegments]); //分段卡的选项个数＝3
28
29     //设置某个选项不可用
30     [smtCContentOffset setEnabled:NO forSegmentAtIndex:0];
31     NSLog(@"分段卡的第一个选项是否可用？%@", [smtCContentOffset isEnabledForSegmentAtIndex:0] ? @"是" : @"否"); //分段卡的第一个选项是否可用？否
32     [self.view addSubview:smtCContentOffset];
33 }
34
35 @end