示例代码：
NSArray *dataSource = @[@"iOS",@"Java",@"PHP"];ISGDropDowList *workStatus = [[ISGDropDowList alloc] iitWithFrame:CGRectMake(20, 100, 300, 30)];// 设置数据源workStatus.listItems = dataSource;// 边框颜色workStatus.borderColor = [UIColor lightGrayColor];// 边框宽度workStatus.borderWidth = 1.0f;// 设置最大列数workStatus.maxRows = dataSource.cout;// 圆角workStatus.corerRadius = 5;// 背景颜色workStatus.comBackgroudColor = [UIColor whiteColor];// 默认标题workStatus.defaultTitle = @"请选择专业：";// 标题大小workStatus.titleSize = 14;// 下拉选中的blockworkStatus.ClickDropDow = ^(NSIteger idex){ NSLog(@"选择了-------------:%@",dataSource[idex]);};[self.view addSubview:workStatus];
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