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OC --(1)--
类和对象:Objective-C概述、面向对象编程、类和对象、实例变量操作
时间: 编辑:iOS-轻狂书生 来源:本站整理
OC语言的特点
1.C语?言的超集,允许在OC中使?用C语?言源代码,编译器兼容C语?言程序。
2.具备完善的?面向对象特性。
3.包含?一个运?行时系统。
5.类库丰富。
除 / & &余 %
通过 self 调用 自身的对象方法
面向对象编程 OOP ( Object Oriented Programming&)
类 :具有相同特征和行为的事物的抽象
对象是类的实例.& & & &类是对象的类型.
面向过程编程思想: 以事件为中心,关心的是解决问题的步骤,实现函数一次调用 (一步一步)
面向对象编程思想(OOP):以事物为中心,关心的是参与问题的对象有哪些,而完成这个问题只是对象所有功能中的一个小功能.
@ &interface& 接口
@interface Person : NSObject // 接口 名: 父类
类的接口部分 :以@intherface 开头 以@end 结尾
@intherface+类的名字:(表示继承)+父类名 {实例 } 方法 @end
在@intherface 和@end 中间 是类的实例变量 和方法的声明
只要符合这种形式 就可以定义一个类的接口部分
@ &implementation& 实现
类的实现部分:@implementation 开头 以@end 结尾
@implementation+类的名字
@implementation 和@end中间写,类方法实现
只要符合这种形式 就可以完成类的实现部分
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MathWorks Machine Translation
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clabelLabel contour plot elevation
Syntaxclabel(C,h)clabel(C,h,v)clabel(C,h,'manual')t = clabel(C,h,'manual')clabel(C)clabel(C,v)clabel(C,'manual')tl = clabel(___)clabel(___,Name,Value)Description
clabel(,) labels
the current contour plot with rotated text inserted into each contour
line. The contour lines must be long enough to fit the label, otherwise clabel does
not insert a label. If you do not have the contour matrix C,
then replace C with [].
clabel(,,) labels
the contour levels specified by vector v.
clabel(,,'manual') labels
the locations you select with the mouse. Click the mouse or press
the space bar to label the contour closest to the center of the crosshair.
Press the Return key while the cursor is within the
figure window to terminate labeling.
= clabel(,,'manual') returns
the text objects created.
clabel() labels contours
with '+' symbols and upright text.
clabel(,) adds
upright labels to the contour levels specified by the vector, v.
clabel(,'manual') adds
upright labels at the locations you select with the mouse. Click the
mouse or press the space bar to label the contour closest to the center
of the crosshair. Press the Return key while the
cursor is within the figure window to terminate labeling.
= clabel(___) returns
the text and line objects created. Use any of the input argument combinations
in the previous syntaxes that do not include the contour object h.
clabel(___,) modifies
the label appearance using one or more Name,Value pair
arguments. Use any of the input argument combinations in the previous
syntaxes. For example, 'FontSize',14 sets the font
size to 14 points.
ExamplesCreate a contour plot and obtain the contour matrix, C, and the contour object, h. Then, label the contour plot.[x,y,z] =
[C,h] = contour(x,y,z);
clabel(C,h)Label only the contours with contour levels 2 or 6. [x,y,z] =
[C,h] = contour(x,y,z);
v = [2,6];
clabel(C,h,v)Set the font size of the labels to 15 points and set the color to red using Name,Value pair arguments.[x,y,z] =
[C,h] = contour(x,y,z);
clabel(C,h,'FontSize',15,'Color','red')Set additional properties by reissuing the clabel command. For example, set the font weight to bold and change the color to blue. clabel(C,h,'FontWeight','bold','Color','blue')Set the font size back to the default size using the 'default' keyword.clabel(C,h,'FontSize','default')Create a contour plot and return the contour matrix, C. Then, label the contours.[x,y,z] =
C = contour(x,y,z);
clabel(C)Input Arguments
Name-Value Pair ArgumentsSpecify optional
comma-separated pairs of Name,Value arguments. Name is
the argument name and Value is the corresponding value.
Name must appear inside single quotes (' '). You can
specify several name and value pair arguments in any order as
Name1,Value1,...,NameN,ValueN.Example: clabel(C,h,'Color','red','FontSize',12) specifies
red, 12-point labels.clabel supports the LabelSpacing property
plus a subset of text properties.
Example: clabel(C,h,'LabelSpacing',100)
Example: 'blue'Example: [0
Example: clabel(C,h,'EdgeColor','k')
Example: clabel(C,h,'BackgroundColor','g')
Not all fonts have both font styles. Therefore, the italic font might
look the same as the normal font.
MATLAB® uses the FontWeight property to select a font from
those available on your system. Not all fonts have a bold font weight. Therefore,
specifying a bold font weight still can result in the normal font weight.
Example: clabel(C,h,'FontSmoothing','on')
'normalized' Interpret font size as a fraction of the axes height. If you
resize the axes, the font size modifies accordingly. For example,
if the FontSize is 0.1 in normalized
units, then the text is 1/10 of the axes height.'pixels'Pixels.Starting in R2015b, distances in
pixels are independent of your system resolution on Windows® and Macintosh systems:
On Windows systems, a pixel is 1/96th of an inch.On Macintosh systems, a pixel is 1/72nd of an
On Linux® systems, the size of a pixel is determined
by your system resolution.
If you set both the font size and the font units in one function
call, you must set the FontUnits property first
so that the axes correctly interprets the specified font size.
Example: clabel(C,'FontUnits','normalized')
Example: clabel(C,'Rotation',90)
Since the labels are numeric text, the effect of this property
is limited to subtle changes in the font style and weight.
Example: clabel(C,h,'Interpreter','latex')
'--'Dashed line
':'Dotted line
'-.'Dash-dotted line
'none'No lineNo line
Example: clabel(C,h,'LineStyle','--')
Output ArgumentsSee AlsoFunctions |
| PropertiesIntroduced before R2006a
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