在obj c中聲明爲未使用的標識符，即使它聲明爲

Question

我遇到NSDictionary for循環的問題。字典被稱爲「海灘」，但在循環內海灘未申報。這裏的代碼

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data 
{ 

NSString *jsonString = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding]; 


NSArray *results = [jsonString JSONValue]; 


for (NSDictionary *beach in results);    //beach is flagged as unused 
{ 
    NSString *Name = [beach objectForKey:@"Name"]; //beach is flagged as undeclared 
    NSLog(Name); 
} 

} 

任何建議將是偉大的。

Answer 1

你有一個僞分號在for聲明：

for (NSDictionary *beach in results); 
//        ^

，讓您的代碼等同於：

for (NSDictionary *beach in results) 
    ; 

{ 
    NSString *Name = [beach objectForKey:@"Name"]; 
    NSLog(Name); 
}