ios代码分块管理的一些方法

内联写法：

self.backgroundView = ({

UIView *view = [[UIView alloc] initWithFrame:self.view.bounds];

view.backgroundColor = [UIColor redColor];

view.alpha = 0.8f;

view;

});

[self.view addSubview:self.backgroundView];

block写法：

self.backgroundView = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];

void (^blackView)(UIView *) = ^(UIView *view) {

view.backgroundColor = [UIColor blackColor];

};

blackView(self.backgroundView);

[self.view addSubview:self.backgroundView];