iOS學習-2.據網址顯示源碼

輸入網址，解出源碼，顯示label

我這裡是在第二個界面顯示的，用的屬性傳值。

A界面先從 storyboard 拖個 textfield 和一個 button

.m裡面button的方法

//按鈕點擊方法
- (IBAction)Click:(id)sender {
    //首碼
    NSString *str1 = @"http://";
    //把首碼加到你輸入的網址前
    NSString *str2 = [str1 stringByAppendingString:_field.text];
    //解碼
    NSString *str = [NSString stringWithContentsOfURL:[NSURL URLWithString:str2] encoding:NSUTF8StringEncoding error:nil];
    NSLog(@"%@",str);
    SecondController *secondView = [[SecondController alloc]init];
    //把解出來的字元串賦給B界面的屬性
    secondView.string = str;
    //跳轉，我用的navgation跳的
    [self.navigationController pushViewController:secondView animated:YES];
}

B界面定義一個string用於接收

@property(nonatomic,copy)NSString *string;

.m

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.view.backgroundColor = [UIColor whiteColor];
    UILabel *label= [[UILabel alloc]initWithFrame:CGRectMake(0, 64, self.view.bounds.size.width ,self.view.frame.size.height)];
    [self.view addSubview:label];
    
    label.numberOfLines = 0 ;
    
    label.lineBreakMode = NSLineBreakByTruncatingTail;
    //接收過來的值賦給label
    label.text = _string;
}