block,__bridge_retained代码试例

typedef void (^dd)(void);

@property (strong) dd a ;

@property (copy) dd a ;

__weak id b=self;

self.a=^{

NSLog(@"%@",self);

};

编译器都会有警告:循环引用造成的内存泄露

---------------------------------------------------

CFMutableArrayRef cfObject = NULL;

{

id obj = [[NSMutableArray alloc] init];

cfObject = (__bridge_retained CFMutableArrayRef)obj;

NSLog(@"%lo ng-",CFGetRetainCount(cfObject));

//__weak id oo=obj;

void (^dd)(void)=^{

NSLog(@"%@",obj);

};

//dd();

NSLog(@"%lo ng---",CFGetRetainCount(cfObject));

//CFRelease(cfObject);

}

NSLog(@"%lo ng---",CFGetRetainCount(cfObject));

被block捕获的变量都会被retain.

block,__bridge_retained代码试例,布布扣,bubuko.com