iOS URL 参数分离

记一手URL参数分离代码

NSString *scanResult = [scanResultQRcode stringByRemovingPercentEncoding];  
NSURLComponents *urlComponents = [[NSURLComponents alloc] initWithString:scanResult];   
NSArray *results = urlComponents.queryItems;

@interface NSURLQueryItem : NSObject <NSSecureCoding, NSCopying> {
@private
    NSString *_name;
    NSString *_value;
}

取数组中的NSURLQueryItem对象即可拿到想要的参数