摘要:
iOS7以前都是用Zxing Zbar 来实现 扫描二维码以及条形码,从iOS7 出来后,系统自带API很强大,渐渐也就放弃了Zxing Zbar的使用,直接上主要代码:- (void)setupCamera{ dispatch_async(dispatch_get_global_queue... 阅读全文
摘要:
When a block is copied, it creates strong references to object variables used within the block. If you use a block within the implementation of a meth... 阅读全文