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My USB Device iOS technology support url: You may leave a message if you...
layoutSubviews在以下情况下会被调用: 1、init初始化不会触发layoutSubviews。 2、addSubview会触发la...
self.layer.delegate = self ;这个方法不用写,系统默认会设置delegate为当前view 当调用setNeedsDi...