/** Add a constraint to the enumeration value * code in the Nslayoutconstraint class
*
* @param item:view1: Controls to constrain
* @param attribute:attr1: type of constraint (how to constrain)
* @param relatedby:relation: Relationship to the reference control
* @param toitem:view2: Referenced controls
* @param attribute:attr2: type of constraint (how to constrain) * @param multiplier:multiplier: Multiplier * @param constant:c: constant (fixed value) */Word That's who's where the position is equal to whose position multiply by a factor + last correction value (leftmost right correction is positive, rightmost left correction is negative)/** constraint type options
Nslayoutattributeleft = 1,//left
Nslayoutattributeright,//Right
Nslayoutattributetop,//Top
Nslayoutattributebottom,//Bottom
Nslayoutattributeleading,//left
Nslayoutattributetrailing,//Right
Nslayoutattributewidth,//width
Nslayoutattributeheight,//height
Nslayoutattributecenterx,//center x value
Nslayoutattributecentery,//Center Y value
Nslayoutattributebaseline,//baseline
Nslayoutattributelastbaseline = Nslayoutattributebaseline,
Nslayoutattributefirstbaseline Ns_enum_available_ios (8_0),
Margin margin
Nslayoutattributeleftmargin Ns_enum_available_ios (8_0),
Nslayoutattributerightmargin Ns_enum_available_ios (8_0),
Nslayoutattributetopmargin Ns_enum_available_ios (8_0),
Nslayoutattributebottommargin Ns_enum_available_ios (8_0),
Nslayoutattributeleadingmargin Ns_enum_available_ios (8_0),
Nslayoutattributetrailingmargin Ns_enum_available_ios (8_0),
Nslayoutattributecenterxwithinmargins Ns_enum_available_ios (8_0),
Nslayoutattributecenterywithinmargins Ns_enum_available_ios (8_0),
Nslayoutattributenotanattribute = 0
*/
/** relationship to the reference control
Nslayoutrelationlessthanorequal =-1, less than or equal to
nslayoutrelationequal = 0, equals
Nslayoutrelationgreaterthanorequal = 1, greater than equals */code: Masonry third-party framework/**
Type of constraint:
1. Size: width\height\size
2. Boundary: Left\leading\right\trailing\top\bottom
3. Center point: center\centerx\centery 4. Boundary: Edges//This method will delete all previous constraints and add new constraints
[Blueview mas_remakeconstraints:^ (Masconstraintmaker *make) {
}]; This method will overwrite some of the previous specific constraints
[Blueview mas_updateconstraints:^ (Masconstraintmaker *make) {
}]; The following one is greater than or equal to/less than or equal to (I can't remember, when using the translation software look good) Greaterthanorequalto Equalto equals Lessthanorequalto Mas_equalto: This method will wrap the parameters Equalto: This method does not wrap the parameters mas_equalto the function is stronger than > Equalto Add the above macro there is no difference, a detailed look at ppt*/
iOS Development Basics--all enumerated values in the added constraints
