错误:
自动属性合成不会合成属性'delegate'。它将由其父类(super class)实现，使用@dynamic确认意图
带有错误的代码: @property (nonatomic, weak) id<JBBarChartViewDelegate> delegate;
任何帮助，将不胜感激，谢谢!
这是我的代码:
#import "JBChartView.h"
@class JBBarChartView;
@protocol JBBarChartViewDataSource <JBChartViewDataSource>
@required
/**
* The number of bars in a given bar chart is the number of vertical views shown along the x-axis.
*
* @param barChartView The bar chart object requesting this information.
*
* @return Number of bars in the given chart, displayed horizontally along the chart's x-axis.
*/
- (NSUInteger)numberOfBarsInBarChartView:(JBBarChartView *)barChartView;
@optional
/**
* A UIView subclass representing the bar at a particular index.
*
* Default: solid black UIView.
*
* @param barChartView The bar chart object requesting this information.
* @param index The 0-based index of a given bar (left to right, x-axis).
*
* @return A UIView subclass. The view will automatically be resized by the chart during creation (ie. no need to set the frame).
*/
- (UIView *)barChartView:(JBBarChartView *)barChartView barViewAtIndex:(NSUInteger)index;
@end
@protocol JBBarChartViewDelegate <JBChartViewDelegate>
@required
/**
* Height for a bar at a given index (left to right). There is no ceiling on the the height;
* the chart will automatically normalize all values between the overal min and max heights.
*
* @param barChartView The bar chart object requesting this information.
* @param index The 0-based index of a given bar (left to right, x-axis).
*
* @return The y-axis height of the supplied bar index (x-axis)
*/
- (CGFloat)barChartView:(JBBarChartView *)barChartView heightForBarViewAtIndex:(NSUInteger)index;
@optional
/**
* Occurs when a touch gesture event occurs on a given bar (chart must be expanded).
* and the selection must occur within the bounds of the chart.
*
* @param barChartView A bar chart object informing the delegate about the new selection.
* @param index The 0-based index of a given bar (left to right, x-axis).
* @param touchPoint The touch point in relation to the chart's bounds (excludes footer and header).
*/
- (void)barChartView:(JBBarChartView *)barChartView didSelectBarAtIndex:(NSUInteger)index touchPoint:(CGPoint)touchPoint;
- (void)barChartView:(JBBarChartView *)barChartView didSelectBarAtIndex:(NSUInteger)index;
/**
* Occurs when selection ends by either ending a touch event or selecting an area that is outside the view's bounds.
* For selection start events, see: didSelectBarAtIndex...
*
* @param barChartView A bar chart object informing the delegate about the deselection.
*/
- (void)didDeselectBarChartView:(JBBarChartView *)barChartView;
/**
* If you already implement barChartView:barViewAtIndex: delegate - this method has no effect.
* If a custom UIView isn't supplied, a flat bar will be made automatically (default color black).
*
* Default: if none specified - calls barChartView:barViewAtIndex:.
*
* @param barChartView The bar chart object requesting this information.
* @param index The 0-based index of a given bar (left to right, x-axis).
*
* @return The color to be used to color a bar in the chart.
*/
- (UIColor *)barChartView:(JBBarChartView *)barChartView colorForBarViewAtIndex:(NSUInteger)index;
/**
* The selection color to be overlayed on a bar during touch events.
* The color is automatically faded to transparent (vertically). The property showsVerticalSelection
* must be YES for the color to apply.
*
* Default: white color (faded to transparent).
*
* @param barChartView The bar chart object requesting this information.
*
* @return The color to be used on each bar selection.
*/
- (UIColor *)barSelectionColorForBarChartView:(JBBarChartView *)barChartView;
/**
* Horizontal padding between bars.
*
* Default: 'best-guess' algorithm based on the the total number of bars and width of the chart.
*
* @param barChartView The bar chart object requesting this information.
*
* @return Horizontal width (in pixels) between each bar.
*/
- (CGFloat)barPaddingForBarChartView:(JBBarChartView *)barChartView;
@end
@interface JBBarChartView : JBChartView
//These Two Lines Have The Error
@property (nonatomic, weak) id<JBBarChartViewDataSource> dataSource;
@property (nonatomic, weak) id<JBBarChartViewDelegate> delegate;
//.
/**
* Vertical highlight overlayed on bar during touch events.
*
* Default: YES.
*/
@property (nonatomic, assign) BOOL showsVerticalSelection;
/*
* Bars can be (vertically) positoned top to bottom instead of bottom up.
* If this property is set to YES, both the bar and the selection view will be inverted.
* For the inverted orientation to take effect, reloadData must be called.
*
* Default: NO.
*/
@property (nonatomic, assign, getter=isInverted) BOOL inverted;
@end
最佳答案
您可以使用显式合成或动态修复此类警告。这是代码:
@interface JBBarChartView : JBChartView
//These Two Lines Have The Error
@property (nonatomic, weak) id<JBBarChartViewDataSource, superclassDataSourceIfAvailable> dataSource;
@property (nonatomic, weak) id<JBBarChartViewDelegate, superclassDelegateIfAvailable> delegate;
@end
//MARK:dynamic
@implementation JBBarChartView
@dynamic dataSource;
@dynamic delegate;
@end
//MARK:explicitly synthesize
@implementation JBBarChartView
@synthesize dataSource;
@synthesize delegate;
@end
检查此doc以查找有关clang的更多信息
关于ios - Xcode 6.3-自动属性合成不会合成属性，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/30338154/