UIToolbar的简单用法
UIToolbar
开发中经常会用到的控件之一,实现起来也很简单,与此同时我们还要知道 UIBarButtonItem 和 Fixed Space Bar Button Item,这两个小东西是在Bar上的按钮和间距,都被对象化了。
来看代码:
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#import "ViewController.h" @interface ViewController () //声明 @property (nonatomic, strong) UIToolbar *mytoolbar; @end @implementation ViewController - (void)viewDidLoad { [ super viewDidLoad]; //实例化 self.mytoolbar = [[UIToolbar alloc]initWithFrame:CGRectMake(0, 100, self.view.frame.size.width, 30)]; //添加到视图 [self.view addSubview:self.mytoolbar]; //选择风格,这里我们选择黑色风格 self.mytoolbar.barStyle = UIBarStyleBlack; //添加按钮和按钮之间的间距,这些都被对象化了,按钮是可以实现方法的 UIBarButtonItem *item1 = [[UIBarButtonItem alloc]initWithTitle:@ "hello" style:UIBarButtonItemStylePlain target:self action:@selector(sayhello)]; UIBarButtonItem *fixed = [[UIBarButtonItem alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil]; UIBarButtonItem *item2 = [[UIBarButtonItem alloc]initWithTitle:@ "bye" style:UIBarButtonItemStylePlain target:self action:@selector(saybye)]; //实例化的UIToolbar里面有items属性,是一个数组,用来存放我们要加上去的按钮 self.mytoolbar.items = @[item1, fixed, item2]; } //点击item要实现的方法,输出hello或者bye - (IBAction)sayhello{ NSLog(@ "hello" ); } - (IBAction)saybye{ NSLog(@ "bye" ); } - (void)didReceiveMemoryWarning { [ super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } @end |