UIWindow
UIWindow类是UIView的子类,可以看作是特殊的UIView(UIView之后介绍)。
一般应用程序只有一个UIWindow对象。
// 创建UIWindow对象
// [UIScreen mainScreen].bounds是屏幕大小
self.window = [[UIWindow alloc] initWithFrame:[UIScreen mainScreen].bounds];
// 给window设置背景颜色(白色)
self.window.backgroundColor = [UIColor whiteColor];
// 使window显示
[self.window makeKeyAndVisible];
// 创建一个视图控制器
UIViewController *VC = [[UIViewController alloc] init];
// 给Window指定根视图控制器
self.window.rootViewController = VC;
UIView
// 开辟空间创建UIView对象
// 设置frame确定UIView对象的位置以及大小
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];
// 设置UIView对象的属性:设置背景颜色
view.backgroundColor = [UIColor redColor];
// 将创建好的UIView对象添加到Window上显示
[self.window addSubview:view];
屏幕快照 2017-08-15 下午6.48.42.png
UIlable
UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(40, 60, 100, 40)];
label.backgroundColor = [UIColor orangeColor];
//要显示的文本内容
label.text = @"用户";
//文本内容的颜色
label.textColor = [UIColor whiteColor];
//文本的对齐方式(水平方向)
label.textAlignment = NSTextAlignmentCenter;
//文本字体
//label.font = [UIFont fontWithName:@"Helvetica-Bold" size:26];
label.font =[UIFont systemFontOfSize:20];
//行数
label.numberOfLines = 2;
//断行模式
label.lineBreakMode = NSLineBreakByWordWrapping;
//阴影颜色
label.shadowColor = [UIColor grayColor];
//阴影大小
label.shadowOffset = CGSizeMake(3, 1);
[self.view addSubview:label];
UITextField
UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(40, 120, 100, 100)];
//占位文本
textField.placeholder = @"哈哈";
//边框风格
textField.borderStyle = UITextBorderStyleRoundedRect;
textField.text = @"hehe";
//是否开始输入的时候清空输入框内容
textField.clearsOnBeginEditing = YES;
//是否文字以圆点格式显示
textField.secureTextEntry = YES;
//弹出键盘的类型(枚举值)
//textField.keyboardType = UIKeyboardTypeNumberPad;
[self.view addSubview:textField];
// UIView *aview = [[UIView alloc] initWithFrame:CGRectMake(100, 0, self.view.frame.size.width, 200)];
// aview.backgroundColor = [UIColor cyanColor];
// //自定义键盘
// textField.inputView = aview;
UIView *inputAccessoryView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 50)];
inputAccessoryView.backgroundColor = [UIColor purpleColor];
//输入视图上方的辅助视图(默认nil)
textField.inputAccessoryView = inputAccessoryView;
//清除按钮模式(枚举值)
textField.clearButtonMode =UITextFieldViewModeWhileEditing;
UIView *leftView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 40, 40)];
leftView.backgroundColor = [UIColor grayColor];
textField.leftView = leftView;
textField.leftViewMode = UITextFieldViewModeAlways;
textField.delegate = self;
//1.目标(事件发生是,谁去干什么,动作的执行者) 2.方法动作 (事件发生是,干什么事) 3.控制事件(发生的事)
[textField addTarget:self action:@selector(textChang:) forControlEvents:UIControlEventEditingChanged];
关于textField的一些方法
//action的方法可以将触发的事件的对象作为参数传递过来(addTarget方法的调用者)
-(void)textChang:(UITextField *)textField{
NSLog(@"%@",textField.text);
NSLog(@"值改变了");
}
- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField{
NSLog(@"将要开始编辑");
return YES;
}
-(BOOL)textFieldShouldReturn:(UITextField *)textField{
NSLog(@"return");
//回收键盘到二种方法
//[textField resignFirstResponder];
[textField endEditing:YES];
NSLog(@"%@",textField.text);
return YES;
}
- (void)textFieldDidBeginEditing:(UITextField *)textField{
NSLog( @"已经编辑");
}
- (BOOL)textFieldShouldEndEditing:(UITextField *)textField{
NSLog(@"将要完成编辑");
return YES;
}
-(void)textFieldDidEndEditing:(UITextField *)textField{
NSLog(@"ok");
}
UIImageView
UIImageView *zombieImageView = [[UIImageView alloc] initWithImage:[imageArray firstObject]];
zombieImageView.frame = CGRectMake(300, 60, 120, 100);
[self.view addSubview:zombieImageView];
//设置要播放的一组图片
zombieImageView.animationImages = imageArray;
//设置播放总时间
zombieImageView.animationDuration = 2;
//设置播放一组图片的循环次数(0为无线循环)
zombieImageView.animationRepeatCount = 0;
//开始播放
[zombieImageView startAnimating];
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