Question

我有代码，在将图像保存到集合之前裁剪图像，但代码是异步执行的。在裁剪图像之前执行插入到集合。

Meteor.methods({
    'createWorkout': function(workoutFormContent, fileObj) {
        // crop image to width:height = 3:2 aspect ratio
        var workoutImage = gm(fileObj.path);
        workoutImage.size(function(error, size) {
            if (error) console.log(error);
            height = size.height;
            width = size.height * 1.5;
            workoutImage
                .gravity("Center")
                .crop(width, height)
                .write(fileObj.path, function(error) {
                    if (error) console.log(error)
                });
        });

        // add image to form content and insert to collection      
        workoutFormContent.workoutImage = fileObj;
        Workouts.insert(workoutFormContent, function(error) {
            if (error) {
                console.log(error);
            }
        });
    },
});

如何同步运行此代码才能插入已裁剪的图像？

Answer 1

仅在裁剪图像后写入集合：

var physics = Array<UInt32>()



struct PhysicsCategory{

    static let square1 : UInt32 = 0x1 << 1
    static let square2 : UInt32 = 0x1 << 2
    static let square3 : UInt32 = 0x1 << 3
    static let square4 : UInt32 = 0x1 << 4
    static let square5 : UInt32 = 0x1 << 5
    static let square6 : UInt32 = 0x1 << 6
    static let square7 : UInt32 = 0x1 << 7
    static let square8 : UInt32 = 0x1 << 8
    static let square9 : UInt32 = 0x1 << 9
}

override func didMove(to view: SKView) {

    physics.append(PhysicsCategory.square1)
    physics.append(PhysicsCategory.square2)
    physics.append(PhysicsCategory.square3)
    physics.append(PhysicsCategory.square4)
    physics.append(PhysicsCategory.square5)
    physics.append(PhysicsCategory.square6)
    physics.append(PhysicsCategory.square7)
    physics.append(PhysicsCategory.square8)
    physics.append(PhysicsCategory.square9)


   for i in (0...8){

        squares[i].node.physicsBody = SKPhysicsBody(rectangleOf: squares[i].node.size )
        squares[i].node.physicsBody?.categoryBitMask = physics[i]
        squares[i].node.physicsBody?.affectedByGravity = false
        squares[i].node.physicsBody?.isDynamic = false
        squares[i].node.physicsBody?.contactTestBitMask = PhysicsCategory.Circle
        squares[i].node.physicsBody?.collisionBitMask = 0


    }

}

或者使用import { Meteor } from 'meteor/meteor'; import gm from 'gm'; const bound = Meteor.bindEnvironment((callback) => {callback();}); Meteor.methods({ createWorkout(workoutFormContent, fileObj) { // crop image to width:height = 3:2 aspect ratio const workoutImage = gm(fileObj.path); workoutImage.size((error, size) => { bound(() => { if (error) { console.log(error); return; } const height = size.height; const width = size.height * 1.5; workoutImage.gravity('Center').crop(width, height).write(fileObj.path, (writeError) => { bound(() => { if (writeError) { console.log(writeError); return; } // add image to form content and insert to collection workoutFormContent.workoutImage = fileObj; Workouts.insert(workoutFormContent, (insertError) => { if (insertError) { console.log(insertError); } }); }); }); }); }); } }); lib，它可用于阻止事件循环。

Meteor同步执行功能

1 个答案: