iOS - PNChart

参考：
https://github.com/kevinzhow/PNChart
http://www.jianshu.com/p/fa8398e9ec62
http://blog.csdn.net/goyohol/article/details/53948983

#import "PNChart.h"

#define ARC4RANDOM_MAX      0x100000000

@interface ChartViewController ()
@property (nonatomic, strong) PNLineChart *lineChart;
@end

-(void)viewDidLoad {
    [super viewDidLoad];
    [self configureView];
    // Do any additional setup after loading the view.
}

-(void)configureView{
    [self.view addSubview:self.lineChart];
    [self setLineChart];
}

-(void)setLineChart{
    NSMutableArray *xLabelArray = [[NSMutableArray alloc] init];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.dateFormat = @"HH:mm";
    for (int i = 0; i < 7; i++) {
        NSString *xLabelStr = [dateFormatter stringFromDate:[NSDate dateWithTimeInterval:i * 10 * 60 sinceDate:self.timePicker.date]];
        [xLabelArray addObject:xLabelStr];
    }
    [_lineChart setXLabels:xLabelArray];
    
    NSMutableArray *data01Array = [[NSMutableArray alloc] init];
    for (int i = 0; i < 7; i++) {
        double data = ((double)arc4random() / ARC4RANDOM_MAX) * 6.0f;
        [data01Array addObject:[NSNumber numberWithDouble:data]];
    }
    PNLineChartData *data01 = [[PNLineChartData alloc] init];
    data01.color = kDefaultColor;
    data01.inflexionPointColor = [UIColor whiteColor];
    data01.itemCount = _lineChart.xLabels.count;
    data01.getData = ^(NSUInteger index) {
        CGFloat yValue = [data01Array[index] floatValue];
        return [PNLineChartDataItem dataItemWithY:yValue];
    };
    data01.inflexionPointStyle = PNLineChartPointStyleCircle;
    data01.inflexionPointColor = kDefaultColor;
    
    NSArray * data02Array = @[@3.5, @3.5, @3.5, @3.5, @3.5, @3.5, @3.5];
    PNLineChartData *data02 = [[PNLineChartData alloc] init];
    data02.color = [UIColor redColor];
    data02.itemCount = _lineChart.xLabels.count;
    data02.getData = ^(NSUInteger index) {
        CGFloat yValue = [data02Array[index] floatValue];
        return [PNLineChartDataItem dataItemWithY:yValue];
    };
    
    _lineChart.chartData = @[data01, data02];
    [_lineChart strokeChart];
}

-(PNLineChart *)lineChart{
    if (!_lineChart) {
        _lineChart = [[PNLineChart alloc] initWithFrame:CGRectMake(0, SCREEN_HEIGHT / 9.2, SCREEN_WIDTH, SCREEN_HEIGHT / 2.4)];
        _lineChart.yLabelFormat = @"%1.1f";
        _lineChart.showSmoothLines = YES;
        _lineChart.showCoordinateAxis = YES;
        _lineChart.showYGridLines = YES;
        _lineChart.yGridLinesColor = [UIColor grayColor];
        _lineChart.axisColor = [UIColor blackColor];
    }
    return _lineChart;
}

#import "PNChart.h"

#define ARC4RANDOM_MAX      0x100000000

@interface ChartViewController ()
@property (nonatomic, strong) PNBarChart *barChart;
@end

-(void)viewDidLoad {
    [super viewDidLoad];
    [self configureView];
    // Do any additional setup after loading the view.
}

-(void)configureView{
    [self.view addSubview:self.barChart];
    [self setBarChart];
}

-(void)setBarChart{
    NSMutableArray *xLabelArray = [[NSMutableArray alloc] init];
    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
    dateFormatter.dateFormat = @"MM-dd";
    for (int i = 0; i < 7; i++) {
        NSString *xLabelStr = [dateFormatter stringFromDate:[NSDate dateWithTimeInterval:i * 24 * 60 * 60 sinceDate:self.timePicker.date]];
        [xLabelArray addObject:xLabelStr];
    }
    [_barChart setXLabels:xLabelArray];

    NSMutableArray *yValueArray = [[NSMutableArray alloc] init];
    for (int i = 0; i < 7; i++) {
        double data = floorf(((double)arc4random() / ARC4RANDOM_MAX) * 60.0f);
        [yValueArray addObject:[NSNumber numberWithDouble:data]];
    }
    [_barChart setYValues:yValueArray];
    [_barChart strokeChart];
}

-(PNBarChart *)barChart{
    if (!_barChart) {
        _barChart = [[PNBarChart alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, 300)];
        _barChart.backgroundColor = [UIColor whiteColor];
        _barChart.showChartBorder = YES;
        _barChart.chartBorderColor = [UIColor blackColor];
        _barChart.strokeColor = kDefaultColor;
        _barChart.chartMarginLeft = 30.0;
        _barChart.chartMarginRight = 10.0;
        _barChart.chartMarginTop = 10.0;
    }
    return _barChart;
}