“This is the 14th day of my participation in the First Challenge 2022. For details: First Challenge 2022.”

The introduction

Application Scenarios:

1. Sub-orders do not display policy information
2. The upper and lower order lists show different subviews

The order list at this level does not display the distribution terminal button subview

The sub-agent’s order list displays the distribution terminal button subview

3. Display the audit button when there is no audit status in the details interface of warehousing order, otherwise hide the audit button)

I Dynamic control using installation and removal of MASConstraint

1. Define the MASConstraint attribute 2. Store the MASConstraint attribute. 3. Remove and unload specific constraints based on specific conditions

1.1 Sub-orders do not display policy information

Install and remove using MASConstraint

    [self.noLab mas_updateConstraints:^(MASConstraintMaker *make) {
       self.makeheight4noLab =  make.height.mas_equalTo(kAdjustRatio(0));
    }];
    
    
    if(models.isLowerOrder){// Subordinates do not display policy information
        [self.makeheight4noLab install];

    }else{[self.makeheight4noLab uninstall];


    }

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1.2 Unaudited status display audit button on details interface of warehouse entry order, otherwise hidden.

• Comparison of effects before and after

Specific use method:

1.1 Define the MASConstraint attribute

1.2 Store the MASConstraint attribute

1.3 Remove and unload specific constraints based on the use of containing specific fields models.tradeno

• Define the MASConstraint attribute

/** Remove and install constraints at the bottom of the image */
@property MASConstraint *makebottomequalToWeakSelf4imgV;



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• Store the MASConstraint attribute

    __weak __typeof__(self) weakSelf = self;
    
    [self.imgV mas_updateConstraints:^(MASConstraintMaker *make) {
        self.makebottomequalToWeakSelf4imgV = make.bottom.equalTo(weakSelf).offset(-kAdjustRatio(14));
        
        
        
    }];

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• Remove and unload specific constraints based on the use of containing specific fields models.tradeno

        if(! weakSelf.viewModel.isShowBottomBtn){ [self.makebottomequalToWeakSelf4TV install];

        }else{[self.makebottomequalToWeakSelf4TV uninstall];

            
        }


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II Update view height constraints to dynamically control the display and hiding of subview buttons

Requirement: Dynamic control of subview button display and hide

Example: The order list of this level does not display the distribution terminal button subview. The order list of a subordinate agent displays the distribution terminal button subview

The height constraint of the view is controlled according to the type of the upper and lower levels of the model, thus controlling the display and hiding of the view

• Define assign terminal button properties

/** Assign terminal button */
@property (strong.nonatomic) QCTStoreOrderButton *allocationBtn;

- (QCTStoreOrderButton *)allocationBtn{
    if(! _allocationBtn) { QCTStoreOrderButton *tmp = [[QCTStoreOrderButton alloc]init]; _allocationBtn = tmp; [tmp setTitle:QCTLocal(@" Distribution terminal") forState:UIControlStateNormal];
        
        
        
        __weak __typeof__(self) weakSelf = self;

        [self addSubview:tmp];
        
        [tmp mas_makeConstraints:^(MASConstraintMaker *make) {
            
            
            
            make.height.mas_equalTo(kAdjustRatio(25));
            make.width.mas_greaterThanOrEqualTo(kAdjustRatio(70));

            
            make.right.equalTo(weakSelf).offset(-kAdjustRatio(kSideMargin));
            
            make.top.equalTo(weakSelf.quantityAllottedLab.mas_bottom).offset(kAdjustRatio(6));
            
            
            
                        make.bottom.equalTo(weakSelf).offset(-kAdjustRatio(13));
            

            // make.size.mas_equalTo(CGSizeMake(kAdjustRatio(74), kAdjustRatio(28)));

            
        }];
        [tmp.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.offset(kAdjustRatio(3));
            make.right.offset(kAdjustRatio(- 3));


        }];
        
        tmp.titleLabel.textAlignment = NSTextAlignmentCenter;
        
        
    }
    return _allocationBtn;
}



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• The height constraint of the view is controlled according to the type of the upper and lower levels of the model, thus controlling the display and hiding of the view

    __weak __typeof__(self) weakSelf = self;

    [self.allocationBtn mas_updateConstraints:^(MASConstraintMaker *make) {
        
        
        if(! models.isLowerOrder){// "isLowerOrder" : "false"
            

            
            
            make.top.equalTo(weakSelf.quantityAllottedLab.mas_bottom).offset(kAdjustRatio(0));
            

            make.height.mas_equalTo(kAdjustRatio(0));
            
            
        }else{/ / at a lower level
            make.top.equalTo(weakSelf.quantityAllottedLab.mas_bottom).offset(kAdjustRatio(6));
            

            make.height.mas_equalTo(kAdjustRatio(30)); }}];Copy the code

see also

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