ios 没有可见的@interface 声明选择器错误
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原文地址: http://stackoverflow.com/questions/17543985/
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No visible @interface declares the selector error
提问by Sezgin
I have a connection class in my project. I want to use this class in for a lot of works. When I tried to call this class's function getting following error : No visible @interface declares the selector error
我的项目中有一个连接类。我想在很多作品中使用这个类。当我尝试调用这个类的函数时出现以下错误：没有可见的@interface 声明了选择器错误
coreConnection.h
核心连接.h
@interface coreConnection:NSArray
{
NSData *returnData;
}
-(NSArray*)getData;
@end
coreConnection.m
coreConnection.m
#import "coreConnection.h"
@implementation coreConnection
-(NSArray*)getData:(NSString*)link
{
NSOperationQueue *apiCallsQueue = [[NSOperationQueue alloc] init];
NSURL *URL = [NSURL URLWithString:link];
NSURLRequest *request = [NSURLRequest requestWithURL:URL];
[NSURLConnection sendAsynchronousRequest:request queue:apiCallsQueue completionHandler:^(NSURLResponse *response, NSData *data, NSError *error) {
dispatch_async(dispatch_get_main_queue(), ^{
returnData = data;
});
}];
return [NSJSONSerialization JSONObjectWithData:returnData options:nil error:nil];
}
@end
viewController.m
视图控制器.m
#import "coreConnection.h"
- (void)viewDidLoad
{
[[self headlineCollectionView]setDelegate:self];
[[self headlineCollectionView]setDataSource:self];
[self.headlineCollectionView registerNib:[UINib nibWithNibName:@"HeadLineCell" bundle:nil] forCellWithReuseIdentifier:@"CELL"];
coreConnection speed=[[coreConnection alloc] init];;
headline = [speed getData:@"string"];
[self.headlineCollectionView reloadData];
[super viewDidLoad];
}
采纳答案by Lithu T.V
Hehe the problem is pretty simple your method in implementation and used in code is
呵呵，问题很简单，你的实现方法和代码中使用的是
-(NSArray*)getData:(NSString*)link
not
不是
-(NSArray*)getData;
which is declared in .h file so make the declaration as
这是在 .h 文件中声明的，因此声明为
-(NSArray*)getData:(NSString*)link;
in .h file
在 .h 文件中
EDIT
编辑
You also missed *in allocing the object
你也错过 *了分配对象
Use
用
coreConnection *speed=[[coreConnection alloc] init];;
回答by Maulik
You just need to declare your method -(NSArray*)getData:(NSString*)link;in coreConnection.hfile.
你只需要-(NSArray*)getData:(NSString*)link;在coreConnection.h文件中声明你的方法。
