【背景】
xcode中，已经通过swift代码：
（下面代码已经被修改了，不是原先的了。。。）
let ownedSchoolCoinBgView =UIImageView(image:UIImage(named:"school_coin_top_bg.png")) let ownedSchoolCoinTxtView =UIView(frame:CGRectMake(20,40,100,40)) let myCoinImage =UIImageView(image:UIImage(named:"school_coin_my_coin.png")) ownedSchoolCoinTxtView.addSubview(myCoinImage) ownedSchoolCoinBgView.addSubview(ownedSchoolCoinTxtView) let ownedSchoolCoinValueView =UITextView(frame:CGRectMake(20+20,40,100,40)) ownedSchoolCoinValueView.text ="拥有的时酷币" ownedSchoolCoinValueView.textColor =UIColor.whiteColor() ownedSchoolCoinValueView.backgroundColor =UIColor.clearColor() ownedSchoolCoinValueView.textAlignment =NSTextAlignment.Center ownedSchoolCoinBgView.addSubview(ownedSchoolCoinValueView) self.view.addSubview(ownedSchoolCoinBgView)
实现了效果：
但是很明显：
本身设置了一个矩形区域，然后左边一个图片，右边一个文字
然后调节了半天，还是没有实现我所希望的：
先是让图片和文字，垂直方向，居中对齐
然后再去让右边的文字，显示的水平的x轴坐标值是左边图片的宽度，再加一点间隔
就类似于：
myCoinImage.frame.width + 5
或
myCoinImage.frame.size.width + 5
【解决过程】
1.搜：
swift UIView hirozontal center inside rectangle
swift UIView align horizontal center inside rectangle
参考：
ios – Center align Labels and images inside UIView programatically with Swift – Stack Overflow
objective c – how to align my image in the center IOS horizontally – Stack Overflow
iphone – How to center a subview of UIView – Stack Overflow
暂时用代码：
let ownedSchoolCoinTxtView =UIView(frame:CGRectMake(20,40,100,24)) ownedSchoolCoinTxtView.backgroundColor =UIColor.blueColor() let myCoinImage =UIImageView(image:UIImage(named:"school_coin_my_coin.png")) //myCoinImage.center.y = ownedSchoolCoinTxtView.center.y let ownedSchoolCoinValueView =UITextView(frame:CGRectMake(20+20,40,100,24)) ownedSchoolCoinValueView.text ="拥有的时酷币" ownedSchoolCoinValueView.textColor =UIColor.whiteColor() ownedSchoolCoinValueView.backgroundColor =UIColor.clearColor() //ownedSchoolCoinValueView.textAlignment = NSTextAlignment.Center ownedSchoolCoinValueView.center.y = ownedSchoolCoinTxtView.center.y ownedSchoolCoinTxtView.addSubview(myCoinImage) ownedSchoolCoinTxtView.addSubview(ownedSchoolCoinValueView)
效果：
基本满意，但是还是不精确。
2.搜：
swift image horizontal center inside rectangle
参考：
后来自己加了背景色后：
可以看出：
是右边的text没有上下垂直方向，居中对齐。
期间遇到：
【未解决】Swift中的offsetInPlace的含义和用法
3.搜：
swift UITextView vertical alignment
参考：
UITextView vertical center text alignment in Swift · GitHub
Example of vertical alignment for UITextView · GitHub
iOS: Vertical aligning text in a UITextView | Imagineric
A UITextView subclass that supports vertical text alignment
好像是 垂直方式显示的text，不是我要的。
4.官网：
Aligning Views with Auto Layout – NSView Class Reference
中的很多属性，比如：
alignmentRectForFrame
不知道具体啥意思，去搜索：
swift alignmentRectForFrame
5.去研究研究：
【已解决】swift中的UITextView、UITextField、UILabel的区别
6.参考：
swift – NSTextAlignment.Justified for UILabel does not work – Stack Overflow
7.然后去整理：
再去试试：把image的center.y赋值给text的center.y看看是否可以水平居中对齐
ownedSchoolCoinText.center.y = myCoinImage.center.y
结果：
还是不能对齐。
目前调试了半天的代码：
let ownedSchoolCoinUpperLeftTextView = UIView(frame: CGRectMake(20, 40, 120, 24))
ownedSchoolCoinUpperLeftTextView.backgroundColor = UIColor.blueColor()
let myCoinImage = UIImageView(image: UIImage(named:"school_coin_my_coin.png"))
//myCoinImage.center.y = ownedSchoolCoinUpperLeftTextView.center.y
myCoinImage.backgroundColor = UIColor.cyanColor()
print("myCoinImage.frame.size=\(myCoinImage.frame.size)") //myCoinImage.frame.size=(24.0, 24.0)
print("myCoinImage.bounds=\(myCoinImage.bounds)") //myCoinImage.bounds=(0.0, 0.0, 24.0, 24.0)
let ownedSchoolCoinText = UITextView(frame: CGRectMake(myCoinImage.frame.size.width, 0, 100, myCoinImage.frame.size.height))
//let ownedSchoolCoinText = UITextView()
ownedSchoolCoinText.text = "拥有的时酷币"
ownedSchoolCoinText.textColor = UIColor.whiteColor()
//ownedSchoolCoinText.backgroundColor = UIColor.clearColor()
ownedSchoolCoinText.backgroundColor = UIColor.brownColor()
//ownedSchoolCoinText.font = UIFont.boldSystemFontOfSize(13)
//ownedSchoolCoinText.textAlignment = NSTextAlignment.Center
//ownedSchoolCoinText.center.y = ownedSchoolCoinUpperLeftTextView.center.y
print("ownedSchoolCoinUpperLeftTextView.center=\(ownedSchoolCoinUpperLeftTextView.center)") //ownedSchoolCoinUpperLeftTextView.center=(80.0, 52.0)
print("ownedSchoolCoinText.center=\(ownedSchoolCoinText.center)") //ownedSchoolCoinText.center=(74.0, 12.0)
print("myCoinImage.center=\(myCoinImage.center)") //myCoinImage.center=(12.0, 12.0)
//ownedSchoolCoinText.center.y = myCoinImage.center.y - 1
//ownedSchoolCoinText.center.y = myCoinImage.center.y
//ownedSchoolCoinText.center.y = ownedSchoolCoinUpperLeftTextView.center.y
ownedSchoolCoinUpperLeftTextView.addSubview(myCoinImage)
ownedSchoolCoinUpperLeftTextView.addSubview(ownedSchoolCoinText)效果还是和之前一样。
8.有空去换用UILabel去试试，或许会y轴方向能居中。
然后试了试UILable的代码：
//let ownedSchoolCoinText = UITextView(frame: CGRectMake(myCoinImage.frame.size.width, 0, 100, myCoinImage.frame.size.height))
//let ownedSchoolCoinText = UITextView()
let ownedSchoolCoinText = UILabel(frame: CGRectMake(myCoinImage.frame.size.width, 0, 100, myCoinImage.frame.size.height))
ownedSchoolCoinText.text = "拥有的时酷币"
ownedSchoolCoinText.textColor = UIColor.whiteColor()
ownedSchoolCoinText.backgroundColor = UIColor.brownColor()
ownedSchoolCoinText.font = UIFont.boldSystemFontOfSize(13)
ownedSchoolCoinUpperLeftTextView.addSubview(myCoinImage)
ownedSchoolCoinUpperLeftTextView.addSubview(ownedSchoolCoinText)结果很明显能看出来，文字和图标，是水平线居中对齐的。
【总结】
之前用UITextView，结果无论如何配置text的属性，如何设置对齐，始终无法实现水平线的居中对齐，费劲千辛万苦，最后换了UILabel后，结果立刻可以居中对齐了。
所用代码如下：
//let ownedSchoolCoinText = UITextView(frame: CGRectMake(myCoinImage.frame.size.width, 0, 100, myCoinImage.frame.size.height)) //let ownedSchoolCoinText = UITextView() let ownedSchoolCoinText = UILabel(frame: CGRectMake(myCoinImage.frame.size.width, 0, 100, myCoinImage.frame.size.height)) ownedSchoolCoinText.text = "拥有的时酷币" ownedSchoolCoinText.textColor = UIColor.whiteColor() ownedSchoolCoinText.backgroundColor = UIColor.brownColor() ownedSchoolCoinText.font = UIFont.boldSystemFontOfSize(13) ownedSchoolCoinUpperLeftTextView.addSubview(myCoinImage) ownedSchoolCoinUpperLeftTextView.addSubview(ownedSchoolCoinText)
供参考。