自定义的一个时间选择器,使用简单方便，支持xib，storyboard
//初始化
_mpicker = [[MPickerView alloc] initWithFrame:CGRectMake(0, 64, self.view.bounds.size.width, 10)];
_mpicker.delegate = self;
[self.view addSubview:_mpicker];
//每一列文字颜色
_mpicker.colorArry = @[color,color,color,color,color];
//每一列的背景颜色
_mpicker.bkcolorArry = @[color1,color1,color1,color2,color2];
//是否标记周末
_mpicker.isBJZM = YES;
//设置默认时间
_mpicker.defaultDate = @"2015-1-1 14:20";
