在iOS中绘制矩形

Question

我的应用程序的目标是让用户能够通过滑动iPhone屏幕的左侧和右侧来排序不同的日程安排选项。当用户通过这些不同的日程安排选项排序时，如何绘制和删除矩形？

我有一个UIViewController.h，UIViewController.m和UIViewController.xib文件来操纵。我需要一个单独的UIView类吗？如果是这样，我该如何将UIView类连接到我的.xib文件中的视图？

Answer 1

哇...这么多复杂的解决方案，这里是你需要的东西：

UIView *myBox = [[UIView alloc] initWithFrame:CGRectMake(180, 35, 10, 10)]; 
myBox.backgroundColor = [UIColor lightGrayColor]; 
[self.view addSubview:myBox]; 

没有别的......不需要发疯的实施。

Answer 2

首先制作一个CustomView。

#import <UIKit/UIKit.h> 

@interface MyView : UIView 

@end 

---

#import "MyView.h" 

@implementation MyView 

- (id)initWithFrame:(CGRect)frame 
{ 
    self = [super initWithFrame:frame]; 
    if (self) { 
     // Initialization code 
    } 
    return self; 
} 


// Only override drawRect: if you perform custom drawing. 
// An empty implementation adversely affects performance during animation. 
- (void)drawRect:(CGRect)rect 
{ 
    // Drawing Rect 
    [[UIColor redColor] setFill];　　　　　　　　　　　　　 // red 
    UIRectFill(CGRectInset(self.bounds, 100, 100)); 
} 


@end 

你测试。链接到你的AppDelegate或视图控制器

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions 
{  
    MyView* view = [[MyView alloc]initWithFrame:CGRectMake(10, 30, 300, 400)]; 
    view.backgroundColor = [UIColor blackColor]; 
    [window addSubview:view]; 

    [self.window makeKeyAndVisible]; 

    return YES; 
} 

---

- (void)viewDidLoad 
{ 
    MyView* view = [[MyView alloc]initWithFrame:CGRectMake(10, 30, 300, 400)]; 
    view.backgroundColor = [UIColor blackColor]; 
    [self.view addSubview:view]; 

    [super viewDidLoad]; 
} 

Answer 3

一个UIView发生在一个长方形的形状绘制，所以如果你需要的是改变矩形的颜色，设置的backgroundColor财产UIView到你想要的颜色。

一个空的UIView会做：

UIView *view = [[UIView alloc] initWithFrame:CGRectMake(x, y, width, height)]; 
view.backgroundColor = [UIColor redColor]; 

如果从界面生成器做这件事，从库中拖出一个新的视图到画布上，并设置在查看其属性的背景色。

对于简单情况，您可能不需要自定义视图。您还可以将其他项目添加到“矩形”视图中，例如用于显示文本的UILabels。

Answer 4

// 1st Add QuartzCore.framework to your project's "Link Binary with Libraries". 

// 2nd Import the header in your .m file (of targeted view controller): 

#import <QuartzCore/QuartzCore.h> 

// 3rd Inside - (void)viewDidLoad method: 
// Create a UIBezierPath (replace the coordinates with whatever you want): 
UIBezierPath *path = [UIBezierPath bezierPath]; 
[path moveToPoint:CGPointMake(10.0, 10.0)]; 
// # Entry Point with 10px white frame 
[path moveToPoint:CGPointMake(10.0, 10.0)]; 
// # Keeping 10px frame with iPhone's 450 on y-axis 
[path addLineToPoint:CGPointMake(10.0, 450.0)]; 
// # Substracting 10px for frame on x-axis, and moving 450 in y-axis 
[path addLineToPoint:CGPointMake(310.0, 450.0)]; 
// # Moving up to 1st step 10px line, 310px on the x-axis 
[path addLineToPoint:CGPointMake(310.0, 10.0)]; 
// # Back to entry point 
[path addLineToPoint:CGPointMake(10.0, 10.0)]; 

// 4th Create a CAShapeLayer that uses that UIBezierPath: 
CAShapeLayer *shapeLayer = [CAShapeLayer layer]; 
shapeLayer.path = [path CGPath]; 
shapeLayer.strokeColor = [[UIColor blueColor] CGColor]; 
shapeLayer.lineWidth = 3.0; 
shapeLayer.fillColor = [[UIColor clearColor] CGColor]; 
Add that CAShapeLayer to your view's layer: 

// 5th add shapeLayer as sublayer inside layer view 
[self.view.layer addSublayer:shapeLayer]; 

Answer 5

您可以使用此画一个矩形：

UIBezierPath* rectanglePath = [UIBezierPath bezierPathWithRect: CGRectMake(68, 38, 81, 40)]; 
[UIColor.grayColor setFill]; 
[rectanglePath fill];