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标题: 怎么用纯代码的形式创建一个按钮控制另一个按钮移动呢？ [打印本页]
作者: 老王同学    时间: 2015-8-28 09:44
标题: 怎么用纯代码的形式创建一个按钮控制另一个按钮移动呢？
为啥我这样不行呢 望大神告知啊

  2. #import "ViewController.h"

  4. @interface ViewController ()

  6. @end

  8. @implementation ViewController

  10. - (void)viewDidLoad {
  11.     [super viewDidLoad];
  12.     // Do any additional setup after loading the view, typically from a nib.
  13. #pragma mark - 图片按钮的创建
  14.    
  15.     //1.创建按钮
  16.     UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
  17.     //2.设置frame
  18.     btn.frame=CGRectMake(50, 50, 50, 50);
  19.     //3.设置按钮图片
  20.     [btn setBackgroundImage:[UIImage imageNamed:@"biaoqingdi"] forState:UIControlStateNormal];
  21.     [btn setBackgroundImage:[UIImage imageNamed:@"danteng"] forState:UIControlStateHighlighted];
  22.     //4.设置图片文字
  23.     [btn setTitle:@"别点我" forState:UIControlStateNormal];
  24.     [btn setTitle:@"真点了" forState:UIControlStateHighlighted];
  25.     //5.设置按钮文字颜色
  26.     [btn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
  27.     [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateHighlighted];
  28.     //6.添加到view
  29.     [self.view addSubview:btn];
  30. #pragma mark - 向上
  31.     //1.创建按钮
  32.     UIButton *shang = [UIButton buttonWithType:UIButtonTypeCustom];
  33.     //2.设置frame
  34.     shang.frame = CGRectMake(150, 150, 30, 30);
  35.     //3.设置按钮背景图片
  36.     [shang setBackgroundImage:[UIImage imageNamed:@"top_normal"] forState:UIControlStateNormal];
  37.     [shang setBackgroundImage:[UIImage imageNamed:@"top_highlighted"] forState:UIControlStateHighlighted];
  38.     //4.监听按钮点击事件
  39.     [shang addTarget:self action:@selector(up) forControlEvents:UIControlEventTouchUpInside];
  40.     //5.添加到view
  41.     [self.view addSubview:shang];
  42.    
  43.    
  44. }
  45. -(IBAction)up{
  46. CGRect rect = self.btn.frame;      //为什么这样不行呢
  47. rect.origin.y-=10;
  48. self.btn.frame=rect;
  49.    
  50. }
  51. - (void)didReceiveMemoryWarning {
  52.     [super didReceiveMemoryWarning];
  53.     // Dispose of any resources that can be recreated.
  54. }

  56. @end
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