Ios 在矩形图形中输入字母

为了显示加载，我画了三个矩形，但是我想在这些矩形中输入字母，我怎样才能在其中输入字母

我的功能：

- (void)configUI {
    self.backgroundColor = [UIColor clearColor];

    UIView *rect1 = [self drawRectAtPosition:CGPointMake(0, 0)];
    UIView *rect2 = [self drawRectAtPosition:CGPointMake(20, 0)];
    UIView *rect3 = [self drawRectAtPosition:CGPointMake(40, 0)];

    [self addSubview:rect1];
    [self addSubview:rect2];
    [self addSubview:rect3];

    [self doAnimateCycleWithRects:@[rect1, rect2, rect3]];
}

---

我想在

rect1

中插入字母“A”，在

rect2

中插入字母“B”，在

rect3

中插入字母“C”

使用

UILabel

而不是

UIView

。设置标签文本。（请注意，

UILabel

的背景颜色与

UIView

类似）

要在视图上绘制字符串，需要创建

UIView

的子类。在视图控制器中导入此视图，并将上述视图创建为自定义视图的对象

在自定义视图中，有一个视图替代方法-

- (void)drawRect:(CGRect)rect;

这是可以绘制字符串和设置绘图属性的地方

例如：自定义视图类

CustomView.h

#import <UIKit/UIKit.h>

@interface CustomView : UIView

@property (nonatomic, strong) NSString  *drawString;

@end

现在，在代码中创建此自定义类的视图对象类型：

- (void)configUI {
    self.backgroundColor = [UIColor clearColor];

    CustomView *rect1 = [self drawRectAtPosition:CGPointMake(0, 0)];
    CustomView *rect2 = [self drawRectAtPosition:CGPointMake(20, 0)];
    CustomView *rect3 = [self drawRectAtPosition:CGPointMake(40, 0)];

    // This will draw text to view
    [rect1 setDrawString:@"A"];
    [rect2 setDrawString:@"B"];
    [rect3 setDrawString:@"C"];

    [rect1 setBackgroundColor:[UIColor whiteColor]];
    [rect2 setBackgroundColor:[UIColor whiteColor]];
    [rect3 setBackgroundColor:[UIColor whiteColor]];

    [self addSubview:rect1];
    [self addSubview:rect2];
    [self addSubview:rect3];

    [self doAnimateCycleWithRects:@[rect1, rect2, rect3]];
}

- (void)configUI {
    self.backgroundColor = [UIColor clearColor];

    CustomView *rect1 = [self drawRectAtPosition:CGPointMake(0, 0)];
    CustomView *rect2 = [self drawRectAtPosition:CGPointMake(20, 0)];
    CustomView *rect3 = [self drawRectAtPosition:CGPointMake(40, 0)];

    // This will draw text to view
    [rect1 setDrawString:@"A"];
    [rect2 setDrawString:@"B"];
    [rect3 setDrawString:@"C"];

    [rect1 setBackgroundColor:[UIColor whiteColor]];
    [rect2 setBackgroundColor:[UIColor whiteColor]];
    [rect3 setBackgroundColor:[UIColor whiteColor]];

    [self addSubview:rect1];
    [self addSubview:rect2];
    [self addSubview:rect3];

    [self doAnimateCycleWithRects:@[rect1, rect2, rect3]];
}