ios ~ Block 一般用法：

同一个block方法的写法：

第一种写法：

typedef void(^ClickSolarTermBlock) (GWHome_SolarTermModel *solarTermModel);
@property (nonatomic, copy) ClickSolarTermBlock clickSolarTermBlock;

第二种写法：

@property (nonatomic, copy) void (^clickSolarTermBlock) (GWHome_SolarTermModel *solarTermModel);

使用：

if (self.clickSolarTermBlock) {
    self.clickSolarTermBlock(model);
}

回调：

__weak typeof(self) weakSelf = self;
GWHome_SolarTermsTreeCTRL *solarTermsTreeVC = [[GWHome_SolarTermsTreeCTRL alloc] init];
solarTermsTreeVC.selectSolarTermBlock = ^(GWHome_SolarTermModel * _Nonnull select_solarTermModel) {

    weakSelf.solarTermModel = select_solarTermModel;
    weakSelf.detailTableHeaderView.solarTermModel = weakSelf.solarTermModel;
    [weakSelf.detailTableHeaderView refreshSolarTermsDetailTableHeaderView];

};
[self.navigationController pushViewController:solarTermsTreeVC animated:YES];