Declare a NSString in multiple lines
This is an example:
NSString *html = [NSString stringWithFormat:@"<html> \n"
"<head> \n"
"<style type=\"text/css\"> \n"
"body {font-family: \"%@\"; font-size: %dpx;}\n"
"img {max-width: 300px; width: auto; height: auto;}\n"
"</style> \n"
"</head> \n"
"<body><h1>%@</h1>%@</body> \n"
"</html>", @"helvetica", 16, [item objectForKey:@"title"], [item objectForKey:@"content:encoded"]];