自定义UIButton

    //打开 ButtonViewController.m 文件:   
       
    - (void)viewDidLoad {  
              
            [super viewDidLoad];  
              
        //创建按钮  
             UIButton *sampleButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];  
          
       
        //设置按钮位置  
             [sampleButton setFrame:CGRectMake(10, 100, self.view.bounds.size.width- 20, 52)];  
              
        //定义按钮标题  
             [sampleButton setTitle:@"Button Title" forState:UIControlStateNormal];  
              
        //定义按钮标题字体格式  
             [sampleButton.titleLabel setFont:[UIFont boldSystemFontOfSize:20]];  
              
        //定义按钮背景图片，redButton.png已经存在，拖放添加图片文件到image项目文件夹中  
             [sampleButton setBackgroundImage:[[UIImage imageNamed:@"redButton.png"]stretchableImageWithLeftCapWidth:0.0 topCapHeight:0.0] forState:UIControlStateNormal];  
              
        //添加点击按钮所执行的程式  
             [sampleButton addTarget:self action:@selector(buttonClicked)forControlEvents:UIControlEventTouchUpInside];  
              
       //在 View 中加入按钮  
             [self.viewaddSubview:sampleButton];  
              
       
    }  
       
    //  
       
    -(void) buttonClicked {  
                       
    }