效果如下：
ViewController.h
1 #import <UIKit/UIKit.h> 2 3 @interface ViewController : UIViewController 4 @property (strong, nonatomic) IBOutlet UISegmentedControl *colorChoice; 5 @property (strong, nonatomic) IBOutlet UILabel *chosenColor; 6 @property (strong, nonatomic) IBOutlet UIWebView *flowerView; 7 8 @end
ViewController.m
1 #import "ViewController.h"
2
3 @interface ViewController ()
4 @end
5
6 @implementation ViewController
7
8 - (IBAction)getFlower:(id)sender {
9 NSString *colorVal;
10 NSInteger colorIndex = self.colorChoice.selectedSegmentIndex;
11 switch (colorIndex) {
12 case 0:
13 colorVal = @"red";
14 break;
15 case 1:
16 colorVal = @"blue";
17 break;
18 case 2:
19 colorVal = @"yellow";
20 break;
21 case 3:
22 colorVal = @"green";
23 break;
24 default:
25 break;
26 }
27 self.chosenColor.text = colorVal;
28 NSString *outputHTML = [[NSString alloc] initWithFormat:@"<body style=‘margin: 0px; padding: 0px‘><img style=‘width:560px, height:420px‘ src=‘http://www.floraphotographs.com/showrandom.php?color=%@‘></body>", colorVal];
29 [self.flowerView loadHTMLString:outputHTML baseURL:nil];
30 }
31
32 - (void)viewDidLoad {
33 [super viewDidLoad];
34 // Do any additional setup after loading the view, typically from a nib.
35 }
36
37 - (void)didReceiveMemoryWarning {
38 [super didReceiveMemoryWarning];
39 // Dispose of any resources that can be recreated.
40 }
41
42 @end
时间： 2024-12-14 07:32:51