Merge pull request #174 from lunzii/master

Add PNLineChart with setYLabels.

@@ -47,6 +47,8 @@
 @property (nonatomic) CGFloat chartCavanWidth;
 @property (nonatomic) CGFloat chartMargin;
 @property (nonatomic) BOOL showLabel;
+@property (nonatomic) BOOL showGenYLabels;
+
 
 /**
  * Controls whether to show the coordinate axis. Default is NO.

@@ -52,7 +52,7 @@
 
 #pragma mark instance methods
 
-- (void)setYLabels:(NSArray *)yLabels
+- (void)setYLabels
 {
     CGFloat yStep = (_yValueMax - _yValueMin) / _yLabelNum;
     CGFloat yStepHeight = _chartCavanHeight / _yLabelNum;
@@ -104,6 +104,54 @@
     }
 }
 
+- (void)setYLabels:(NSArray *)yLabels
+{
+    _showGenYLabels = NO;
+    _yLabelNum = yLabels.count - 1;
+    
+    CGFloat yLabelHeight;
+    if (_showLabel) {
+        yLabelHeight = _chartCavanHeight / [yLabels count];
+    } else {
+        yLabelHeight = (self.frame.size.height) / [yLabels count];
+    }
+    
+    return [self setYLabels:yLabels withHeight:yLabelHeight];
+}
+
+- (void)setYLabels:(NSArray *)yLabels withHeight:(CGFloat)height
+{
+    _yLabels = yLabels;
+    _yLabelHeight = height;
+    if (_yChartLabels) {
+        for (PNChartLabel * label in _yChartLabels) {
+            [label removeFromSuperview];
+        }
+    }else{
+        _yChartLabels = [NSMutableArray new];
+    }
+    
+    NSString *labelText;
+    
+    if (_showLabel) {
+        CGFloat yStepHeight = _chartCavanHeight / _yLabelNum;
+        
+        for (int index = 0; index < yLabels.count; index++) {
+            labelText = yLabels[index];
+            
+#warning modify origin
+            NSInteger y = (NSInteger)(_chartCavanHeight - index * yStepHeight);
+            
+            PNChartLabel *label = [[PNChartLabel alloc] initWithFrame:CGRectMake(0.0, y, (NSInteger)_chartMargin, (NSInteger)_yLabelHeight)];
+            [label setTextAlignment:NSTextAlignmentRight];
+            label.text = labelText;
+            [self setCustomStyleForYLabel:label];
+            [self addSubview:label];
+            [_yChartLabels addObject:label];
+        }
+    }
+}
+
 - (CGFloat)computeEqualWidthForXLabels:(NSArray *)xLabels
 {
     CGFloat xLabelWidth;
@@ -548,8 +596,8 @@
     _yValueMin = _yFixedValueMin ? _yFixedValueMin : yMin ;
     _yValueMax = _yFixedValueMax ? _yFixedValueMax : yMax + yMax / 10.0;
     
-    if (_showLabel) {
-        [self setYLabels:yLabelsArray];
+    if (_showGenYLabels) {
+        [self setYLabels];
     }
     
 }
@@ -683,6 +731,7 @@
     self.clipsToBounds   = YES;
     self.chartLineArray  = [NSMutableArray new];
     _showLabel            = YES;
+    _showGenYLabels        = YES;
     _pathPoints          = [[NSMutableArray alloc] init];
     _endPointsOfPath     = [[NSMutableArray alloc] init];
     self.userInteractionEnabled = YES;

@@ -33,11 +33,22 @@
         
         //Use yFixedValueMax and yFixedValueMin to Fix the Max and Min Y Value
         //Only if you needed
-        self.lineChart.yFixedValueMax = 500.0;
-        self.lineChart.yFixedValueMin = 1.0;
+        self.lineChart.yFixedValueMax = 300.0;
+        self.lineChart.yFixedValueMin = 0.0;
+
+        [self.lineChart setYLabels:@[
+            @"0 min",
+            @"50 min",
+            @"100 min",
+            @"150 min",
+            @"200 min",
+            @"250 min",
+            @"300 min",
+            ]
+         ];
         
         // Line Chart #1
-        NSArray * data01Array = @[@60.1, @160.1, @126.4, @262.2, @186.2, @127.2, @176.2];
+        NSArray * data01Array = @[@60.1, @160.1, @126.4, @0.0, @186.2, @127.2, @176.2];
         PNLineChartData *data01 = [PNLineChartData new];
         data01.dataTitle = @"Alpha";
         data01.color = PNFreshGreen;
@@ -50,7 +61,7 @@
         };
         
         // Line Chart #2
-        NSArray * data02Array = @[@20.1, @180.1, @26.4, @202.2, @126.2, @167.2, @276.2];
+        NSArray * data02Array = @[@0.0, @180.1, @26.4, @202.2, @126.2, @167.2, @276.2];
         PNLineChartData *data02 = [PNLineChartData new];
         data02.dataTitle = @"Beta Beta Beta Beta";
         data02.color = PNTwitterColor;