[Reading Notes] iOS-NSNumber, ios-nsnumber

[Reading Notes] iOS-NSNumber, ios-nsnumber

NSArray and NSDictionary can only store objects, but cannot directly store any basic types of data, such as int, float, or struct. But you can use objects to encapsulate basic values. For example, encapsulate int type data into an object, and then you can put this object into NSArray or NSDictionary.

The Code is as follows:

-(Void) viewDidLoad {[super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. NSNumber * numberInt = [NSNumber numberWithInt: 1]; NSNumber * numberFloat = [NSNumber numberWithFloat: 1.0]; Limit * array = [[NSMutableArray alloc] limit: numberInt, numberFloat, nil] NSLog (@ "-- array -- % @", array );}

Output:

20:22:59. 825 NSNumber [531: 12193] -- array -- (1, 1)

 

References: Objective-C basic tutorial