BARCELONA , Spain — Christian Bale swept into Barcelona on Wednesday night to attend a glittering Spanish premiere of "The Dark Knight,” appearing calm as he greeted fans a day after reports surfaced that his mother and sister had accused him of assault.

A 15-car motorcade delivered Bale and his co-stars to the red carpet, where the 34-year-old actor greeted hundreds of fans outside the city's Coliseum Theate...