iOS-NSString ? :

Tell me what happened????????

NSString tmp = nil;
NSString *width = [NSString stringWithFormat:@"%@", (tmp = [dicDetail objectForKey:@"width"]) ? tmp : @""];
            
NSString *height = [NSString stringWithFormat:@"%@", tmp = [dicDetail objectForKey:@"height"] ? tmp : @""];

iOS-NSString ? :

原文：http://blog.csdn.net/ouyangtianhan/article/details/18226639