xcode 如何使用左侧或右侧移动 UILabel？
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How to move UILabel using left or right side?
提问by wayneh
I'm new to XCode/iOS and I'm trying to figure out how to move a Label based on the left (or right) side, not the center.
我是 XCode/iOS 的新手，我试图弄清楚如何基于左侧（或右侧）而不是中心移动标签。
All I can find is something like this:
我所能找到的是这样的：
[myLabel setCenter:CGPointMake(x,y)];
I've also seen this variant:
我也见过这个变种：
myLabel.center=CGPointMake(x,y);
My question has two parts:
我的问题有两个部分：
How do do something similar, but without using the label center?
Is ".center" a property of the
UILabelobject? For example, in MS/VB/C#/etc. objects have ".left, .right, .top, .bottom" for positioning - is there something similar in iOS/Objective-C?
如何做类似的事情，但不使用标签中心？
“.center”是
UILabel对象的属性吗？例如，在 MS/VB/C#/etc 中。对象具有用于定位的“.left、.right、.top、.bottom” - 在 iOS/Objective-C 中是否有类似的东西？
回答by Noah Witherspoon
centeris a property of UIView, and no, there's no equivalent left, right, or whatever. You need to do the calculation manually: the label's left side is label.frame.origin.xand its right side is label.frame.origin.x + label.frame.size.width. If you want to move the label so it's right-aligned with a particular coordinate, then you can do something like this:
center是的UIView的属性，没有，没有相当的left，right或者别的什么东西。您需要手动进行计算：标签的左侧是label.frame.origin.x，右侧是label.frame.origin.x + label.frame.size.width。如果要移动标签使其与特定坐标右对齐，则可以执行以下操作：
label.frame = CGRectMake(100 - label.frame.size.width, label.frame.origin.y, label.frame.size.width, label.frame.size.height);
回答by AAV
You need to do the calculation manually to find X and Y coordinate to use in following code.
您需要手动进行计算以找到要在以下代码中使用的 X 和 Y 坐标。
label.frame = CGRectMake(
label.frame.origin.x, label.frame.origin.y,
label.frame.size.width, labelSize.height);
回答by Jesse Black
You could use centeror frameto adjust the position of the label. These are properties of UIView.
您可以使用center或frame来调整标签的位置。这些是 的属性UIView。
framereturns a CGRect. A CGRectis made up of CGPoint(origin) and CGSize(size). The origin specifies the left and top coordinates for the view.
frame返回一个CGRect. ACGRect由CGPoint（原点）和CGSize（尺寸）组成。原点指定视图的左坐标和上坐标。
CGRect frame = label.frame;
label.origin.x = desiredLeft;
label.frame = frame;
or
或者
CGRect frame = label.frame;
label.origin.x = desiredRight-label.size.width;
label.frame = frame;
