源码0305-画饼图－柱状图－绘制文字和图片

//  PieView.m
//  05-画饼图
#import "PieView.h"
@implementation PieView
- (NSArray *)arrRandom
{
    int totoal = 100;
    
    NSMutableArray *arrM = [NSMutableArray array];
    
    int temp = 0; // 30 40 30
    for (int i = 0; i < arc4random_uniform(10) + 1; i++) {
        temp = arc4random_uniform(totoal) + 1;
        
        // 100 1~100
        
        // 随机出来的临时值等于总值，直接退出循环，因为已经把总数分配完毕，没必要在分配。
        
        
        [arrM addObject:@(temp)];
        
        // 解决方式：当随机出来的数等于总数直接退出循环。
        if (temp == totoal) {
            break;
        }

        totoal -= temp;
        
    }
    // 100 30 1~100
    // 70 40 0 ~ 69 1 ~ 70
    // 30 25
    // 5
    
    if (totoal) {
        [arrM addObject:@(totoal)];
    }
    
    return arrM;
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
    
    NSArray *arr = [self arrRandom];
    CGFloat radius = rect.size.width * 0.5;
    CGPoint center = CGPointMake(radius, radius);
    
    
    CGFloat startA = 0;
    CGFloat angle = 0;
    CGFloat endA = 0;
    

    for (int i = 0; i < arr.count; i++) {
        startA = endA;
        angle = [arr[i] integerValue] / 100.0 * M_PI * 2;
        endA = startA + angle;
        UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];
        
        [path addLineToPoint:center];
        
        [[self colorRandom] set];
        
        [path fill];
    }
    
    
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self setNeedsDisplay];
}
- (UIColor *)colorRandom
{
    // 0 ~ 255 / 255
    // OC:0 ~ 1
    CGFloat r = arc4random_uniform(256) / 255.0;
    CGFloat g = arc4random_uniform(256) / 255.0;
    CGFloat b = arc4random_uniform(256) / 255.0;
    return [UIColor colorWithRed:r green:g blue:b alpha:1];
}

- (void)draw
{
    CGFloat radius = self.bounds.size.width * 0.5;
    CGPoint center = CGPointMake(radius, radius);
    
    
    CGFloat startA = 0;
    CGFloat angle = 0;
    CGFloat endA = 0;

    
    // 第一个扇形
    angle = 25 / 100.0 * M_PI * 2;
    endA = startA + angle;
    UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];
    
    // 添加一根线到圆心
    [path addLineToPoint:center];
    
    // 描边和填充通用
    [[UIColor redColor] set];
    
    [path fill];
    
    // 第二个扇形
    startA = endA;
    angle = 25 / 100.0 * M_PI * 2;
    endA = startA + angle;
    UIBezierPath *path1 = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];
    
    // 添加一根线到圆心
    [path1 addLineToPoint:center];
    
    // 描边和填充通用
    [[UIColor greenColor] set];
    
    [path1 fill];
    
    // 第二个扇形
    startA = endA;
    angle = 50 / 100.0 * M_PI * 2;
    endA = startA + angle;
    UIBezierPath *path2 = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:startA endAngle:endA clockwise:YES];
    
    // 添加一根线到圆心
    [path2 addLineToPoint:center];
    
    // 描边和填充通用
    [[UIColor blueColor] set];
    
    [path2 fill];

}


@end

//  PieView.h
//  05-画饼图
#import <UIKit/UIKit.h>

@interface PieView : UIView

@end

06柱状图

//  BarView.m
//  06-柱状图
#import "BarView.h"

@implementation BarView


// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
    
    NSArray *arr = [self arrRandom];
    
    
    CGFloat x = 0;
    CGFloat y = 0;
    CGFloat w = 0;
    CGFloat h = 0;
    
    for (int i = 0; i < arr.count; i++) {
        
        w = rect.size.width / (2 * arr.count - 1);
        x = 2 * w * i;
        h = [arr[i] floatValue] / 100.0 * rect.size.height;
        y = rect.size.height - h;
        
        
        UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(x, y, w, h)];
        
        
        [[self colorRandom] set];
        
        [path fill];
        
        
    }
    
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self setNeedsDisplay];
}
- (NSArray *)arrRandom
{
    int totoal = 100;
    
    NSMutableArray *arrM = [NSMutableArray array];
    
    int temp = 0; // 30 40 30
    for (int i = 0; i < arc4random_uniform(10) + 1; i++) {
        temp = arc4random_uniform(totoal) + 1;
        
        // 100 1~100
        
        // 随机出来的临时值等于总值，直接退出循环，因为已经把总数分配完毕，没必要在分配。
        
        
        [arrM addObject:@(temp)];
        
        // 解决方式：当随机出来的数等于总数直接退出循环。
        if (temp == totoal) {
            break;
        }
        
        totoal -= temp;
        
    }
    // 100 30 1~100
    // 70 40 0 ~ 69 1 ~ 70
    // 30 25
    // 5
    
    if (totoal) {
        [arrM addObject:@(totoal)];
    }
    
    return arrM;
}

- (UIColor *)colorRandom
{
    // 0 ~ 255 / 255
    // OC:0 ~ 1
    CGFloat r = arc4random_uniform(256) / 255.0;
    CGFloat g = arc4random_uniform(256) / 255.0;
    CGFloat b = arc4random_uniform(256) / 255.0;
    return [UIColor colorWithRed:r green:g blue:b alpha:1];
    
}



@end

 07-绘制文字和图片

//  ViewController.m
//  07-绘制文字和图片
#import "ViewController.h"

@interface ViewController ()
@property (weak, nonatomic) IBOutlet UILabel *labelView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    NSMutableDictionary *textDict = [NSMutableDictionary dictionary];
    
    // 设置文字颜色
    textDict[NSForegroundColorAttributeName] = [UIColor redColor];
    
    // 设置文字字体
    textDict[NSFontAttributeName] = [UIFont systemFontOfSize:30];
    
    // 设置文字的空心颜色和宽度
    textDict[NSStrokeWidthAttributeName] = @3;
    
    textDict[NSStrokeColorAttributeName] = [UIColor yellowColor];
    
    // 创建阴影对象
    NSShadow *shadow = [[NSShadow alloc] init];
    shadow.shadowColor = [UIColor greenColor];
    shadow.shadowOffset = CGSizeMake(4, 4);
    shadow.shadowBlurRadius = 3;
    textDict[NSShadowAttributeName] = shadow;
    // 创建富文本字符串
    NSAttributedString *strArr = [[NSAttributedString alloc] initWithString:@"asdlsajkldl" attributes:textDict];
    _labelView.attributedText =  strArr;
    
    // 只能计算普通文本框
//    [_labelView sizeToFit];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end

//  DrawView.m
//  07-绘制文字和图片
#import "DrawView.h"

@implementation DrawView


// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
    
    // 超出裁剪区域的内容全部裁剪掉
    // 注意：裁剪必须放在绘制之前
    UIRectClip(CGRectMake(0, 0, 50, 50));
    
    UIImage *image = [UIImage imageNamed:@"001"];
    
    // 默认绘制的内容尺寸跟图片尺寸一样大
//    [image drawAtPoint:CGPointZero];
    
//    [image drawInRect:rect];
    // 绘图
    [image drawAsPatternInRect:rect];
    
}

- (void)awakeFromNib{
//    UIImage *image = [UIImage imageNamed:@"001"];
//    
//    // 默认绘制的内容尺寸跟图片尺寸一样大
//    //    [image drawAtPoint:CGPointZero];
//    
//    
//    //    [image drawInRect:rect];
//    // 绘图
//    [image drawAsPatternInRect:self.bounds];
}

- (void)drawText
{
    // 绘制文字
    
    NSString *str = @"asfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdfasfdsfsdf";
    // 不会换行
    //    [str drawAtPoint:CGPointZero withAttributes:nil];
    
    [str drawInRect:self.bounds withAttributes:nil];

}
- (void)attrText
{
    
    // 绘制文字
    
    NSString *str = @"asfdsfsdf";
    
    
    // 文字的起点
    // Attributes：文本属性

    NSMutableDictionary *textDict = [NSMutableDictionary dictionary];

    // 设置文字颜色
    textDict[NSForegroundColorAttributeName] = [UIColor redColor];

    // 设置文字字体
    textDict[NSFontAttributeName] = [UIFont systemFontOfSize:30];

    // 设置文字的空心颜色和宽度

    textDict[NSStrokeWidthAttributeName] = @3;

    textDict[NSStrokeColorAttributeName] = [UIColor yellowColor];

    // 创建阴影对象
    NSShadow *shadow = [[NSShadow alloc] init];
    shadow.shadowColor = [UIColor greenColor];
    shadow.shadowOffset = CGSizeMake(4, 4);
    shadow.shadowBlurRadius = 3;
    textDict[NSShadowAttributeName] = shadow;

    // 富文本:给普通的文字添加颜色，字体大小
    [str drawAtPoint:CGPointZero withAttributes:textDict];
    }


@end