摘要：- (void)loadView{ UIView *contentView = [[UIViewalloc] initWithFrame:[[UIScreenmainScreen] applicationFrame]]; contentView.backgroundColor = [UIColorlightGrayColor]; UILabel *label = [[UILabelalloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 30.0f)]; label.text = @"Hello,World"; label.ce 阅读全文