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Created February 12, 2012 21:45
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CS 193p Fall 2011 Assignment 3 Graphing Calculator--Task 3: Delegation
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gistfile1.m
@class GraphView;
@protocol GraphViewDataSource
- (float)deltaY:(GraphView *)sender;
@end
@interface GraphView : UIView
@property (nonatomic) CGFloat xValue;
@property (nonatomic, weak) IBOutlet id <GraphViewDataSource> dataSource;
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