Iphone 为什么类在Xcode中不以蓝色显示?
我有一门课叫PlayingCard。我试着在一个叫做PlayingCardDeck的课程中使用它 我已在PlayingCardDeck.h中导入PlayingCard.hIphone 为什么类在Xcode中不以蓝色显示?,iphone,Iphone,我有一门课叫PlayingCard。我试着在一个叫做PlayingCardDeck的课程中使用它 我已在PlayingCardDeck.h中导入PlayingCard.h #import "PlayingCard.h" @interface PlayingCardDeck : Deck @end 当我尝试在PlayingCardDeck.m中调用类方法时,它不会以蓝色显示。XCode确实在自动完成中看到该类,但选中时它不是蓝色的。在这个例子中,我试图调用init方法,但是,我得到了错误预期
#import "PlayingCard.h"
@interface PlayingCardDeck : Deck
@end
当我尝试在PlayingCardDeck.m中调用类方法时,它不会以蓝色显示。XCode确实在自动完成中看到该类,但选中时它不是蓝色的。在这个例子中,我试图调用init方法,但是,我得到了错误预期表达式,好像它的XCode不知道PlayingCard类是什么。调用card.rank=和card.suit=的错误也不起作用,因为我认为PlayingCard未被识别。这是没有意义的,因为我已经定义了这个类并将它导入到PlayCardDeck中?提前谢谢
#import <Foundation/Foundation.h>
#import "Deck.h"
#import "PlayingCard.h"
@interface PlayingCardDeck : Deck
@end
#import "PlayingCardDeck.h"
@implementation PlayingCardDeck
-(id) init
{
self = [super init];
if (self) {
for(NSString *suit in [PlayingCard validSuits])
for(NSUInteger rank =1; rank <= 10; rank++)
PlayingCard *card = [[PlayingCard alloc] init];
card.rank = rank;
card.suit = suit;
}
}
在for循环中缺少
{
和}
会给您带来麻烦
此代码
if (self) {
for(NSString *suit in [PlayingCard validSuits])
for(NSUInteger rank =1; rank <= 10; rank++)
PlayingCard *card = [[PlayingCard alloc] init];
card.rank = rank;
card.suit = suit;
}
在for循环中缺少
{
和}
会给您带来麻烦
此代码
if (self) {
for(NSString *suit in [PlayingCard validSuits])
for(NSUInteger rank =1; rank <= 10; rank++)
PlayingCard *card = [[PlayingCard alloc] init];
card.rank = rank;
card.suit = suit;
}
您正在调用哪个类方法
播放CardDeck
?您是否合成了属性?它是在运行时崩溃,还是给您带来了编译器错误?您在PlayingCardDeck
上调用哪个类方法?您是否合成了属性?它是在运行时崩溃,还是给了你编译器错误?就是这样!谢谢你的洞察力,成功了!谢谢你的洞察力。
if (self) {
for(NSString *suit in [PlayingCard validSuits]) {
for(NSUInteger rank =1; rank <= 10; rank++) {
PlayingCard *card = [[PlayingCard alloc] init];
}
}
card.rank = rank;
card.suit = suit;
}
if (self) {
for(NSString *suit in [PlayingCard validSuits]) {
for(NSUInteger rank =1; rank <= 10; rank++) {
PlayingCard *card = [[PlayingCard alloc] init];
card.rank = rank;
card.suit = suit;
}
}
}