madfrag

摘要： contentSize是scrollview可以滚动的区域，比如frame = (0 ,0 ,320 ,480) contentSize = (320 ,960)，代表你的scrollview可以上下滚动，滚动区域为frame大小的两倍。contentOffset是scrollview当前显示区域顶点相对于frame顶点的偏移量，比如上个例子你拉到最下面，contentoffset就是(0 ,480)，也就是y偏移了480contentInset是scrollview的contentview的顶点相对于scrollview的位置，例如你的contentInset = (0 ,100)，那么你的 阅读全文

摘要： property with 'weak' attribute must be of object type:I have this in my interface:@property(nonatomic, weak)NSTimeInterval*timeStamp;Or：@property (nonatomic, weak) float height;Which my logic told me, I need a time stamp object, that only is going to be used by this class within the context 阅读全文