how to check if a property value exists in array of objects in swift

You can filter the array like this:

let results = objarray.filter { $0.id == 1 }

that will return an array of elements matching the condition specified in the closure - in the above case, it will return an array containing all elements having the id property equal to 1.

Since you need a boolean result, just do a check like:

let exists = results.isEmpty == false

exists will be true if the filtered array has at least one element

//Swift 4.2

    if objarray.contains(where: { $0.id == 1 }) {
        // print("1 exists in the array")
    } else {
        // print("1 does not exists in the array")
    }

In Swift 2.x:

if objarray.contains({ name in name.id == 1 }) {
    print("1 exists in the array")
} else {
    print("1 does not exists in the array")
}

In Swift 3:

if objarray.contains(where: { name in name.id == 1 }) {
    print("1 exists in the array")
} else {
    print("1 does not exists in the array")
}