From 330c31f26891e51a74f5e5944a772f8ffdd9a38e Mon Sep 17 00:00:00 2001
From: Derek Johnson <derekj212@gmail.com>
Date: Wed, 27 Jan 2016 10:44:42 -0800
Subject: [PATCH 1/2] Added ability to override maxValue for line and bar
 charts

Setting maxValue overrides default behavior of using the highest value
as the max y value for the charts.
---
 Source/YOChartImageKit/YOBarChartImage.h  | 6 ++++++
 Source/YOChartImageKit/YOBarChartImage.m  | 2 +-
 Source/YOChartImageKit/YOLineChartImage.h | 6 ++++++
 Source/YOChartImageKit/YOLineChartImage.m | 2 +-
 4 files changed, 14 insertions(+), 2 deletions(-)

diff --git a/Source/YOChartImageKit/YOBarChartImage.h b/Source/YOChartImageKit/YOBarChartImage.h
index 702734e..66e3055 100644
--- a/Source/YOChartImageKit/YOBarChartImage.h
+++ b/Source/YOChartImageKit/YOBarChartImage.h
@@ -29,6 +29,12 @@ typedef NS_ENUM(NSInteger, YOBarChartImageBarStyle){
  */
 @property (nonnull) NSArray<NSNumber *> *values;
 
+/**
+ *  The maximum value to use for the chart. Setting this will override the 
+ *  default behavior of using the highest value as maxValue.
+ */
+@property NSNumber* maxValue;
+
 /**
  *  The style of the bar chart.
  */
diff --git a/Source/YOChartImageKit/YOBarChartImage.m b/Source/YOChartImageKit/YOBarChartImage.m
index c03d9ac..a60bab3 100644
--- a/Source/YOChartImageKit/YOBarChartImage.m
+++ b/Source/YOChartImageKit/YOBarChartImage.m
@@ -22,7 +22,7 @@ - (instancetype)init
 - (UIImage *)drawImage:(CGRect)frame scale:(CGFloat)scale {
     NSAssert(_values.count > 0, @"YOBarChartImage // must assign values property which is an array of NSNumber");
 
-    CGFloat maxValue = [[_values valueForKeyPath:@"@max.floatValue"] floatValue];
+    CGFloat maxValue = _maxValue ? [_maxValue floatValue] : [[_values valueForKeyPath:@"@max.floatValue"] floatValue];
     CGFloat dataCount = (CGFloat)_values.count;
 
     CGFloat padding;
diff --git a/Source/YOChartImageKit/YOLineChartImage.h b/Source/YOChartImageKit/YOLineChartImage.h
index d768518..b9d9b24 100644
--- a/Source/YOChartImageKit/YOLineChartImage.h
+++ b/Source/YOChartImageKit/YOLineChartImage.h
@@ -13,6 +13,12 @@
  */
 @property (nonnull) NSArray<NSNumber *> *values;
 
+/**
+ *  The maximum value to use for the chart. Setting this will override the
+ *  default behavior of using the highest value as maxValue.
+ */
+@property NSNumber* maxValue;
+
 /**
  *  The width of chart's stroke. 
  *  The default width is `1.0`.
diff --git a/Source/YOChartImageKit/YOLineChartImage.m b/Source/YOChartImageKit/YOLineChartImage.m
index 77f86c7..510f2cc 100644
--- a/Source/YOChartImageKit/YOLineChartImage.m
+++ b/Source/YOChartImageKit/YOLineChartImage.m
@@ -18,7 +18,7 @@ - (UIImage *)drawImage:(CGRect)frame scale:(CGFloat)scale {
     NSUInteger valuesCount = _values.count;
     CGFloat pointX = frame.size.width / (valuesCount - 1);
     NSMutableArray<NSValue *> *points = [NSMutableArray array];
-    CGFloat maxValue = [[_values valueForKeyPath:@"@max.floatValue"] floatValue];
+    CGFloat maxValue = _maxValue ? [_maxValue floatValue] : [[_values valueForKeyPath:@"@max.floatValue"] floatValue];
 
     [_values enumerateObjectsUsingBlock:^(NSNumber *number, NSUInteger idx, BOOL *_) {
         CGFloat ratioY = number.floatValue / maxValue;

From c861aea8e9188abcb2947c33b3c55c11adb6e8b0 Mon Sep 17 00:00:00 2001
From: Derek Johnson <derekj212@gmail.com>
Date: Fri, 29 Jan 2016 01:12:19 -0800
Subject: [PATCH 2/2] Getter method and nonnull, nonatomic property

---
 Source/YOChartImageKit/YOBarChartImage.h  | 2 +-
 Source/YOChartImageKit/YOBarChartImage.m  | 4 ++++
 Source/YOChartImageKit/YOLineChartImage.h | 2 +-
 Source/YOChartImageKit/YOLineChartImage.m | 4 ++++
 4 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/Source/YOChartImageKit/YOBarChartImage.h b/Source/YOChartImageKit/YOBarChartImage.h
index 66e3055..4ce9524 100644
--- a/Source/YOChartImageKit/YOBarChartImage.h
+++ b/Source/YOChartImageKit/YOBarChartImage.h
@@ -33,7 +33,7 @@ typedef NS_ENUM(NSInteger, YOBarChartImageBarStyle){
  *  The maximum value to use for the chart. Setting this will override the 
  *  default behavior of using the highest value as maxValue.
  */
-@property NSNumber* maxValue;
+@property (nonnull, nonatomic) NSNumber* maxValue;
 
 /**
  *  The style of the bar chart.
diff --git a/Source/YOChartImageKit/YOBarChartImage.m b/Source/YOChartImageKit/YOBarChartImage.m
index a60bab3..d4c10d0 100644
--- a/Source/YOChartImageKit/YOBarChartImage.m
+++ b/Source/YOChartImageKit/YOBarChartImage.m
@@ -17,6 +17,10 @@ - (instancetype)init
     return self;
 }
 
+- (NSNumber *) maxValue {
+    return _maxValue ? _maxValue : [NSNumber numberWithFloat:[[_values valueForKeyPath:@"@max.floatValue"] floatValue]];
+}
+
 const CGFloat kBarPaddingMultipler = 20.0f;
 
 - (UIImage *)drawImage:(CGRect)frame scale:(CGFloat)scale {
diff --git a/Source/YOChartImageKit/YOLineChartImage.h b/Source/YOChartImageKit/YOLineChartImage.h
index b9d9b24..48bbb3e 100644
--- a/Source/YOChartImageKit/YOLineChartImage.h
+++ b/Source/YOChartImageKit/YOLineChartImage.h
@@ -17,7 +17,7 @@
  *  The maximum value to use for the chart. Setting this will override the
  *  default behavior of using the highest value as maxValue.
  */
-@property NSNumber* maxValue;
+@property (nonnull, nonatomic) NSNumber* maxValue;
 
 /**
  *  The width of chart's stroke. 
diff --git a/Source/YOChartImageKit/YOLineChartImage.m b/Source/YOChartImageKit/YOLineChartImage.m
index 510f2cc..9317ada 100644
--- a/Source/YOChartImageKit/YOLineChartImage.m
+++ b/Source/YOChartImageKit/YOLineChartImage.m
@@ -12,6 +12,10 @@ - (instancetype)init {
     return self;
 }
 
+- (NSNumber *) maxValue {
+    return _maxValue ? _maxValue : [NSNumber numberWithFloat:[[_values valueForKeyPath:@"@max.floatValue"] floatValue]];
+}
+
 - (UIImage *)drawImage:(CGRect)frame scale:(CGFloat)scale {
     NSAssert(_values.count > 0, @"YOLineChartImage // must assign values property which is an array of NSNumber");