xcode 预期的 ';' 在声明列表的末尾
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Expected ';' at end of declarations list
提问by Chris
I'm trying to create a new Objective-C class in Xcode and am getting a couple of the above errors in the .m file.
我正在尝试在 Xcode 中创建一个新的 Objective-C 类，并且在 .m 文件中遇到了上述几个错误。
#import "Query.h"
@implementation Query {
MPMediaQuery *query = [[MPMediaQuery alloc] init]; //create new query
[[query addFilterPredicate: [MPMediaPropertyPredicate
predicateWithValue: @"Vampire Weekend"
forProperty: MPMediaItemPropertyArtist]]; //filter out artists except for Vampire Weekend
// Sets the grouping type for the media query
[query setGroupingType: MPMediaGroupingAlbum]; //sort by album
NSArray *albums = [query collections];
for (MPMediaItemCollection *album in albums) {
MPMediaItem *representativeItem = [album representativeItem];
NSString *artistName =
[representativeItem valueForProperty: MPMediaItemPropertyArtist];
NSString *albumName =
[representativeItem valueForProperty: MPMediaItemPropertyAlbumTitle];
NSLog (@"%@ by %@", albumName, artistName);
NSArray *songs = [album items];
for (MPMediaItem *song in songs) {
NSString *playCount = [song valueForProperty:MPMediaItemPropertyPlayCount];
NSString *lastPlayed = [song valueForProperty:MPMediaItemPropertyLastPlayedDate];
NSString *songTitle =
[song valueForProperty: MPMediaItemPropertyTitle];
//NSString *info = [[NSString alloc] initWithFormat: @"%@ has been played %@ times.\n Last played %@.", songTitle, playCount, lastPlayed];
NSLog(@"\n%@ has been played %@ times.\n Last played %@.", songTitle, playCount, lastPlayed);
}
}
// Override point for customization after application launch.
[query release];
}
@end
Xcode freaks out and gives errors at line that I define an object, or try to use query (since it is undefined).
Xcode 吓坏了，并在我定义对象的行中给出错误，或者尝试使用查询（因为它未定义）。
My header file is as follows (not complete, but I stopped to deal with this):
我的头文件如下（不完整，但我停下来处理这个）：
#import <Foundation/Foundation.h>
#import <MediaPlayer/MediaPlayer.h>
@interface Query : NSObject {
MPMediaQuery *query;
}
@property (nonatomic, retain) MPMediaQuery *query;
@end
回答by mipadi
You need to put your code inside a method -- you can't have it "loose" in the implementation.
你需要把你的代码放在一个方法中——你不能让它在实现中“松散”。
回答by pgb
You don't need the curly braces after the @implementation, and you need to put your code inside some method!
在 之后不需要花括号@implementation，您需要将代码放在某个方法中！
It should read something like:
它应该是这样的：
@implementation Query
- (void)aMethod {
// Code here
}
@end
