load.gif
MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
hud.labelText = @"登录中";
// 设置图片
UIImageView *imgView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"wechat_moment"]];
hud.customView = imgView;
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.rotation.z"];
//默认是顺时针效果，若将fromValue和toValue的值互换，则为逆时针效果
animation.fromValue = [NSNumber numberWithFloat:0.f];
animation.toValue = [NSNumber numberWithFloat: M_PI *2];
animation.duration = 1;
animation.autoreverses = NO;
animation.fillMode =kCAFillModeForwards;
animation.repeatCount = MAXFLOAT; //如果这里想设置成一直自旋转，可以设置为MAXFLOAT，否则设置具体的数值则代表执行多少次
[imgView.layer addAnimation:animation forKey:nil];
// 再设置模式
hud.mode = MBProgressHUDModeCustomView;
// 隐藏时候从父控件中移除
hud.removeFromSuperViewOnHide = YES;
// 1秒之后再消失
[hud hide:YES afterDelay:0.7];
