Stanford iOS Handout Courseware Summary II

The number of parameters in the 1,oc is different, it can be two completely different methods. Such as

-(void) Addcard: (card *) Card attop: (BOOL) attop;

-(void) Addcard: (card *) card;

A second method can be implemented

-(void) Addcard: (Card *) card{[self addcard:card attop:NO];}

2, because to keep the card inside the method, so these three methods are written in the. h file.

-(void) Addcard: (card *) Card attop: (BOOL) attop;

-(void) Addcard: (card *) card;

-(Card *) Drawrandomcard;

And here the object is private, so the following line will be written in the. m file.

@property (Strong, nonatomic) nsmutablearray *cards;

The direct call to cards is definitely empty, so lazy instantiation.

-(Nsmutablearray *) cards {

if (!_cards) _cards = [[Nsmutablearray alloc] init];

return _cards; }

3, the C function of the random number arc4random ()% N, generates a random number of 0 to N.

Initializes the link string, [nsstring stringWithFormat:@ "%d%@", self . Rank, self . Suit];

Initializes an array of @[@ "?" , @ "A", @ "2"];

4,+ is a modified class method.

5, overriding initialization method -(instancetype) init{self = [Super init];

If (self) {

return self;

}}

6,xcode basic use of points skipped

7, get image UIImage *cardimage = [UIImage imagenamed:@ "card"];