iOS 一个有Bug的绘图软件

AppDelegate.h

– (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {

    // Override point for customization after application launch.

    //先建一个窗口，用来盛放其他视图

   self.window=[[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];

    self.window.backgroundColor=[UIColor whiteColor];

    [self.window makeKeyAndVisible];

    //导航控制器，控制页面的跳转

   PaintViewController *VC=[PaintViewController new];

    VC.title=@”画图“;

    UINavigationController *NC=[[UINavigationController alloc]initWithRootViewController:VC];

    self.window.rootViewController=NC;

    return YES;

}

PaintViewController.h

– (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

}

//加载视图

-(void)loadView

{

   self.rootView=[[RootView alloc]initWithFrame:[UIScreen mainScreen].bounds];

    _rootView.backgroundColor=[UIColor whiteColor];

    self.view=self.rootView;

}

– (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

RootView.h

@interface RootView ()

@property(nonatomic)UIButton *button;

@property(nonatomic)UIView *view;

@property(nonatomic)UILabel *point2;

@property(nonatomic)UIColor *color;

@property(nonatomic)NSUInteger flag;

@end

@implementation RootView

//初始化

-(instancetype)initWithFrame:(CGRect)frame

{

    self=[super initWithFrame:frame];

    if (self) {

        [self addAllViews];

    }

    return self;

}

//添加所有的视图

-(void)addAllViews

{

    self.button=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    _button.frame=CGRectMake(300, 610, 50, 20);

    [_button setTitle:@”清空” forState:UIControlStateNormal];

    [_button addTarget:self action:@selector(clear) forControlEvents:UIControlEventTouchUpInside];

    [self addSubview:_button];

    self.view=[[UIView alloc]initWithFrame:CGRectMake(0, 0, 500, 600)];

    _view.backgroundColor=[UIColor whiteColor];

    [self addSubview:_view];

    

    UILabel *random=[[UILabel alloc]initWithFrame:CGRectMake(50, 640, 200, 10)];

    random.text=@”注意：天蓝色为随机色哦^_^”;

    random.font=[UIFont fontWithName:@”Helvetica” size:15];

    [self addSubview:random];

    

    UIButton *cyan=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    cyan.frame=CGRectMake(20, 610, 20, 20);

    cyan.backgroundColor=[UIColor cyanColor];

    [self addSubview:cyan];

    [cyan addTarget:self action:@selector(beCyan) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *black=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    black.frame=CGRectMake(50, 610, 20, 20);

    black.backgroundColor=[UIColor blackColor];

    [self addSubview:black];

    [black addTarget:self action:@selector(beBlack) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *blue=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    blue.frame=CGRectMake(80, 610, 20, 20);

    blue.backgroundColor=[UIColor blueColor];

    [self addSubview:blue];

    [blue addTarget:self action:@selector(beBlue) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *red=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    red.frame=CGRectMake(110, 610, 20, 20);

    red.backgroundColor=[UIColor redColor];

    [self addSubview:red];

    [red addTarget:self action:@selector(beRed) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *green=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    green.frame=CGRectMake(140, 610, 20, 20);

    green.backgroundColor=[UIColor greenColor];

    [self addSubview:green];

    [green addTarget:self action:@selector(beGreen) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *orange=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    orange.frame=CGRectMake(170, 610, 20, 20);

    orange.backgroundColor=[UIColor orangeColor];

    [self addSubview:orange];

    [orange addTarget:self action:@selector(beOrange) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *purple=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    purple.frame=CGRectMake(200, 610, 20, 20);

    purple.backgroundColor=[UIColor purpleColor];

    [self addSubview:purple];

    [purple addTarget:self action:@selector(bePurple) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *gray=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    gray.frame=CGRectMake(230, 610, 20, 20);

    gray.backgroundColor=[UIColor grayColor];

    [self addSubview:gray];

    [gray addTarget:self action:@selector(beGray) forControlEvents:UIControlEventTouchUpInside];

    

    UIButton *yellow=[UIButton buttonWithType:UIButtonTypeRoundedRect];

    yellow.frame=CGRectMake(260, 610, 20, 20);

    yellow.backgroundColor=[UIColor yellowColor];

    [self addSubview:yellow];

    [yellow addTarget:self action:@selector(beYellow) forControlEvents:UIControlEventTouchUpInside];

}

//选色操作

-(void)beCyan

{

    _flag=9;

}

-(void)beBlack

{

    _flag=1;

}

-(void)beBlue

{

    _flag=2;

}

-(void)beRed

{

    _flag=3;

}

-(void)beGreen

{

    _flag=4;

}

-(void)beOrange

{

    _flag=5;

}

-(void)bePurple

{

    _flag=6;

}

-(void)beGray

{

    _flag=7;

}

-(void)beYellow

{

    _flag=8;

}

//清屏操作

-(void)clear

{

    NSArray *array=[_view subviews];

    for (id i in array) {

        [i removeFromSuperview];

    }

//    [_view removeFromSuperview];

//    RootView *newView=[[RootView alloc]initWithFrame:CGRectMake(0, 0, 500, 610)];

//    newView.backgroundColor=[UIColor whiteColor];

//    [self addSubview:newView];

}

//通过拖拽实现画线操作

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

    UITouch *touch=[touches anyObject];

    CGPoint currentPoint=[touch locationInView:self];

    self.point2=[[UILabel alloc]initWithFrame:CGRectMake(currentPoint.x, currentPoint.y, 4, 4)];

    switch (_flag) {

        case 1:

        {

            _point2.backgroundColor=[UIColor blackColor];

            break;

        }

        case 2:

        {

            _point2.backgroundColor=[UIColor blueColor];

            break;

        }

        case 3:

        {

            _point2.backgroundColor=[UIColor redColor];

            break;

        }

        case 4:

        {

            _point2.backgroundColor=[UIColor greenColor];

            break;

        }

        case 5:

        {

            _point2.backgroundColor=[UIColor orangeColor];

            break;

        }

        case 6:

        {

            _point2.backgroundColor=[UIColor purpleColor];

            break;

        }

        case 7:

        {

            _point2.backgroundColor=[UIColor grayColor];

            break;

        }

        case 8:

        {

            _point2.backgroundColor=[UIColor yellowColor];

            break;

        }

        case 9:

        {

            CGFloat R=(arc4random()%255+1)/255.0;

            CGFloat G=(arc4random()%255+1)/255.0;

            CGFloat B=(arc4random()%255+1)/255.0;

            UIColor *randomColor=[UIColor colorWithRed:R green:G blue:B alpha:1];

            _point2.backgroundColor=randomColor;

            break;

        }

        default:

        {

            _point2.backgroundColor=[UIColor blackColor];

            break;

        }

    }

    if (currentPoint.x

        [_view addSubview:_point2];

    }

}

@end

来源：颜华的部落格