#NKWatchChart#

A chart library for Apple Watch based on PNChart. We support line, bar, pie, circle and radar charts now and will integrate more chart types from ios-charts.

##Usage##

###Cocoapods### In your watchOS target

pod 'NKWatchChart'

Then

pod install

And

#import "NKWatchChart.h"

Using Cocoapods with watchOS 2 by Justin Ehlert

###Copy NKWatchChart folder to watch app extension ###

##Requirements##

• watchOS ~> 2.0
• Xcode >= 7.0

##Examples##

####Line Chart####

 NKLineChart *chart = [[NKLineChart alloc] initWithFrame:frame];
chart.yLabelFormat = @"%1.1f";
[chart setXLabels:@[@"SEP 1",@"SEP 2",@"SEP 3",@"SEP 4",@"SEP 5",@"SEP 6",@"SEP 7"]];
chart.showCoordinateAxis = YES;
//Use yFixedValueMax and yFixedValueMin to Fix the Max and Min Y Value//Only if you needed
chart.yFixedValueMax = 300.0;
chart.yFixedValueMin = 0.0;
[chart setYLabels:@[
@"0",
@"50",
@"100",
@"150",
@"200",
@"250",
@"300",
]
];
chart.yLabelFont = [UIFont systemFontOfSize:6.f];
chart.xLabelFont = [UIFont systemFontOfSize:6.f];
chart.xLabelWidth = 10.f;
chart.yLabelColor = NKGreen;
chart.xLabelColor = NKGreen;
chart.axisColor = NKLightGrey;
chart.axisWidth = 1.f;
chart.xUnit = @"Day";
chart.yUnit = @"Min";
// Line Chart #1NSArray * data01Array = @[@60.1, @160.1, @126.4, @0.0, @186.2, @127.2, @176.2];
NKLineChartData *data01 = [NKLineChartData new];
data01.color = NKGreen;
data01.alpha = 0.9f;
data01.itemCount = data01Array.count;
data01.inflexionPointStyle = NKLineChartPointStyleTriangle;
data01.getData = ^(NSUInteger index) {
CGFloat yValue = [data01Array[index] floatValue];
return [NKLineChartDataItem dataItemWithY:yValue];
};
// Line Chart #2NSArray * data02Array = @[@0.0, @180.1, @26.4, @202.2, @126.2, @167.2, @276.2];
NKLineChartData *data02 = [NKLineChartData new];
data02.color = NKTwitterColor;
data02.alpha = 0.5f;
data02.itemCount = data02Array.count;
data02.inflexionPointStyle = NKLineChartPointStyleCircle;
data02.getData = ^(NSUInteger index) {
CGFloat yValue = [data02Array[index] floatValue];
return [NKLineChartDataItem dataItemWithY:yValue];
};
chart.chartData = @[data01,data02];
image = [chart drawImage];
[self.chartImage setImage:image];

####Bar Chart####

 NKBarChart *chart = [[NKBarChart alloc] initWithFrame:frame];
chart.yLabelFormatter = ^(CGFloat yValue){
CGFloat yValueParsed = yValue;
NSString * labelText = [NSStringstringWithFormat:@"%0.f",yValueParsed];
return labelText;
};
chart.labelMarginTop = 5.0;
chart.showChartBorder = YES;
[chart setXLabels:@[@"2",@"3",@"4",@"5",@"2",@"3",@"4",@"5"]];
// self.barChart.yLabels = @[@-10,@0,@10];
[chart setYValues:@[@10.82,@1.88,@6.96,@33.93,@10.82,@1.88,@6.96,@33.93]];
[chart setStrokeColors:@[NKGreen,NKGreen,NKRed,NKGreen,NKGreen,NKGreen,NKRed,NKGreen]];
image = [chart drawImage];
[self.chartImage setImage:image];

####Pie Chart####

NSArray *items = @[[NKPieChartDataItem dataItemWithValue:10color:NKLightGreen],
[NKPieChartDataItem dataItemWithValue:20color:NKFreshGreen description:@"WWDC"],
[NKPieChartDataItem dataItemWithValue:40color:NKDeepGreen description:@"GOOG I/O"],
];
NKPieChart *chart = [[NKPieChart alloc] initWithFrame:frame items:items];
chart.descriptionTextColor = [UIColor whiteColor];
chart.descriptionTextFont = [UIFont systemFontOfSize:12.0];
chart.showAbsoluteValues = NO;
chart.showOnlyValues = NO;
image = [chart drawImage];
[self.chartImage setImage:image];

####Circle Chart####

 UIColor *shadowColor = [UIColor colorWithRed:225.0 / 255.0green:225.0 / 255.0blue:225.0 / 255.0alpha:0.5f];
NKCircleChart *chart = [[NKCircleChart alloc] initWithFrame:frame total:@100current:@60clockwise:YESshadow:YESshadowColor:shadowColor displayCountingLabel:YESoverrideLineWidth:@5];
chart.strokeColor = NKGreen;
chart.strokeColorGradientStart = NKLightGreen;
image = [chart drawImage];
[self.chartImage setImage:image];

####Radar Chart####

NSArray *items = @[[NKRadarChartDataItem dataItemWithValue:3description:@"Art"],
[NKRadarChartDataItem dataItemWithValue:2description:@"Math"],
[NKRadarChartDataItem dataItemWithValue:8description:@"Sports"],
[NKRadarChartDataItem dataItemWithValue:5description:@"Liter"],
[NKRadarChartDataItem dataItemWithValue:4description:@"Other"],
];
NKRadarChart *chart = [[NKRadarChart alloc] initWithFrame:frame items:items valueDivider:1];
image = [chart drawImage];
[self.chartImage setImage:image];

##TODO##

• more testing
• refactoring
• add bubble chart from ios-charts
• add scatter chart
• more chart types

##Apps using NKWatchChart##

Please Let me know at guoleii@gmail.com if you use NKWatchChart in your apps.

##NKWatchChart on medias##

• maniacdev.com

https://maniacdev.com/2015/08/open-source-library-for-drawing-charts-on-the-apple-watch

• watchkitresources.com

http://watchkitresources.com/issues/9

• iphonedev.co.kr in Korean

http://iphonedev.co.kr/sampleSource/24204

• toutiao.io in Chinese

http://toutiao.io/posts/qga8e

##License## This code is distributed under the terms and conditions of the MIT license.

##Thanks## Awesome chart library PNChart by @kevinzhow