1 #pragma mark -- 里程数按钮的点击事件
2
3 - (void)mileageBtnClicked:(UIButton *)sender {
4
5 UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"里程数/km\n\n\n\n\n\n\n\n" message:nil preferredStyle:UIAlertControllerStyleAlert];
6
7 UIPickerView *mileage = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 40, 270, 150)];
8
9 //指定Delegate
10
11 mileage.delegate = self;
12
13 //显示选中框
14
15 mileage.showsSelectionIndicator = YES;
16
17 [alert.view addSubview:mileage];
18
19
20
21 UIAlertAction *ok = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
22
23 NSInteger row = [mileage selectedRowInComponent:0];
24
25 NSString *mileageNum = [pickerData objectAtIndex:row];
26
27 mileageLabel.text = [NSString stringWithFormat:@"%@km", mileageNum];
28
29 }];
30
31
32
33 UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) {
34
35 }];
36
37
38
39 [alert addAction:ok];
40
41 [alert addAction:cancel];
42
43 [self presentViewController:alert animated:YES completion:^{ }];
44
45
46
47 pickerData = [[NSArray alloc] initWithObjects:@"3000",@"3500",@"8000",@"8500",@"13000",@"13500",@"18000",@"18500",@"23000",@"23500",@"28500",@"33000",@"33500",@"38000",@"38500",@"43000",@"43500",@"48000",@"48500",@"53000",@"53500",@"58000",@"58500", nil];
48
49 }
50
51 #pragma mark -- UIPickerViewDataSource
52
53 //返回显示的列数
54
55 - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {
56
57 return 1;
58
59 }
60
61 //返回显示的行数
62
63 - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component {
64
65 return pickerData.count;
66
67 }
68
69 #pragma mark -- UIPickerViewDelegate
70
71 //返回当前行的内容
72
73 - (nullable NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component __TVOS_PROHIBITED {
74
75 return [pickerData objectAtIndex:row];
76
77 }
78
79
