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Start your free trialShaun Kelly
5,648 PointsThis way might be more easier to understand for people but I could be wrong, I just want to know what people think....
ViewController.m
- (IBAction)showFunFact {
self.funFactLabel.text = [self.factBook.facts objectAtIndex:[Utility randomNumberBetween:0 max:self.factBook.numberOfObjectInArray]];
}
FactBook.h
#import <Foundation/Foundation.h>
@interface FactBook : NSObject
@property (nonatomic, strong) NSArray *facts;
//Here i have added another property which will hold the number of objects in the array
@property (nonatomic) NSInteger numberOfObjectInArray;
-(NSString *) randomFact;
@end
FactBook.m
- (instancetype)init
{
self = [super init];
if (self) {
_facts = [[NSArray alloc] initWithObjects:
@"Ants stretch when they wake up.",
@"Ostriches can run faster than horses.",
@"Olympic gold medals are actually made mostly of silver.",
@"You are born with 300 bones; by the time you are an adult you will have 206.",
@"It takes about 8 minutes for light from the Sun to reach Earth.",
@"Some bamboo plants can grow almost a meter in just one day.",
@"The state of Florida is bigger than England.",
@"Some penguins can leap 2-3 meters out of the water.",
@"On average, it takes 66 days to form a new habit.",
@"Mammoths still walked the Earth when the Great Pyramid was being built.",
nil];
//Here i am setting the property to how many object there are in the array
_numberOfObjectInArray = _facts.count;
}
return self;
}
This is a new class i created so i can reuse this as many times
Utility.h
@interface Utility : NSObject
+(NSInteger) randomNumberBetween:(NSInteger)min max:(NSInteger)max;
@end
Utility.m
@implementation Utility
+(NSInteger) randomNumberBetween:(NSInteger)min max:(NSInteger)max{
return arc4random()%(max - min) + min;
}
@end