- (NSString *)stringFormDict:(NSDictionary*)dict
 {
     NSMutableString *str = [NSMutableString string];
     NSArray *keys = [dict allKeys];
     for (NSString *key in keys) {
         if ([[dict objectForKey:key] isKindOfClass:[NSDictionary class]]) {
             id obj = [dict objectForKey:key];
             [str appendFormat:@"\n%@: %@",key,[self stringFormDict:obj]];
         }else if ([[dict objectForKey:key] isKindOfClass:[NSArray class]]){
             [str appendFormat:@"\n%@:",key];
             for (id obj in [dict objectForKey:key]) {
                 [str appendFormat:@"\n%@",[self stringFormDict:obj]];
             }
         }else{
             [str appendFormat:@"\n%@: %@",key,[dict objectForKey:key]];
         }
     }
     return str;
 }
//objectc/5093