IOS学习笔记（一）UIFirst
1 @interface HelloNameAppDelegate : UIResponder <UIApplicationDelegate> 2 { 3 UITextField *_firstNumTF;//TF是textfield的缩写 4 UITextField *_secondNumTF; 5 UILabel *_resultLable; 6 //UIButton *_calculateBT; 7 } 8 @property (strong, nonatomic) UIWindow *window; 9 10 @end
.m代码
1 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 2 { 3 self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease]; 4 // Override point for customization after application launch. 5 self.window.backgroundColor = [UIColor grayColor]; 6 7 //UItextFiled 用于接受用户（少量文字）的UI控件 8 _firstNumTF = [[UITextField alloc]initWithFrame:CGRectMake(10, 50, 80, 30)]; 9 _firstNumTF.borderStyle = UITextBorderStyleRoundedRect;//边框类型 10 _firstNumTF.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;//垂直方向居中对齐 11 _firstNumTF.clearsOnBeginEditing = NO;//带ing的属性值一般是BOOL型,重新编辑时是否重新呼出键盘 12 _firstNumTF.keyboardType = UIKeyboardTypeNumberPad;//键盘类型 13 _firstNumTF.autocapitalizationType = UITextAutocapitalizationTypeNone;//首字母自动大小写 14 _firstNumTF.autocorrectionType = UITextAutocorrectionTypeNo;//自动纠错 15 _firstNumTF.textAlignment = UITextAlignmentRight; 16 //_firstNumTF.a 17 [self.window addSubview:_firstNumTF]; 18 19 UILabel *addLable = [[UILabel alloc]initWithFrame:CGRectMake(90, 50, 30, 30)]; 20 addLable.text = @"+"; 21 addLable.font = [UIFont fontWithName:@"BodoniOrnamentsITCTT" size:30]; 22 addLable.textAlignment = UITextAlignmentCenter; 23 addLable.textColor = [UIColor orangeColor]; 24 addLable.backgroundColor = [UIColor clearColor];//背景色通常设置为clearColor 25 [self.window addSubview:addLable]; 26 27 _secondNumTF = [[UITextField alloc]initWithFrame:CGRectMake(120, 50, 80, 30)]; 28 _secondNumTF.borderStyle = UITextBorderStyleRoundedRect; 29 [self.window addSubview:_secondNumTF]; 30 31 UILabel *equalLable = [[UILabel alloc]initWithFrame:CGRectMake(200, 50, 30, 30 )]; 32 equalLable.text = @"="; 33 equalLable.font = [UIFont fontWithName:@"BodoniOrnamentsITCTT" size:30]; 34 equalLable.textAlignment = UITextAlignmentCenter; 35 equalLable.textColor = [UIColor orangeColor]; 36 equalLable.backgroundColor = [UIColor purpleColor]; 37 equalLable.shadowColor = [UIColor blueColor];//阴影颜色 38 equalLable.shadowOffset = CGSizeMake(5, 5);//阴影偏移，向右，向下偏为正数 39 [self.window addSubview:equalLable]; 40 41 _resultLable = [[UILabel alloc]initWithFrame:CGRectMake(230, 50, 80, 30)]; 42 _resultLable.text = @""; 43 [self.window addSubview:_resultLable]; 44 //button本身包含UIImage UIButton UIImage三层 45 UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect]; 46 button.frame = CGRectMake(100, 100, 120, 40); 47 [button setTitle:@"计算" forState:UIControlStateNormal]; 48 [button setTitle:@"BINGGO" forState:UIControlStateHighlighted]; 49 [button addTarget:self action:@selector(buttonTapped) forControlEvents:UIControlEventTouchUpInside]; 50 [self.window addSubview:button]; 51 52 [self.window makeKeyAndVisible]; 53 return YES; 54 } 55 56 -(void)buttonTapped 57 { 58 float first = [_firstNumTF.text floatValue]; 59 float second = [_secondNumTF.text floatValue]; 60 float result = first + second; 61 _resultLable.text = [NSString stringWithFormat:@"%g",result];//浮点数结果 去掉后面无意义的0 62 //[_firstNumTF resignFirstResponder];//取消第一响应者,回收键盘 63 //[_secondNumTF resignFirstResponder];//取消第一响应者 64 // UITextFieldDelegate 65 }
效果：
