In Qt Creator, examples are missed

Does that help You are have different sequence when reading from Parcel than the one you write in.
In writeToParcel() you are first putting String but in the HeatFriendDetail(Parcel in), you first read integer. It is not the correct way because the order or read/write matters.

public class FriendDetail implements Parcelable {

    private String full_name;
    private int privacy;

    public HeatFriendDetail(Parcel in) {
        this.full_name = in.readString();
        this.privacy = in.readInt();
    }

    public HeatFriendDetail() {

    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {

        dest.writeString(this.full_name);
        dest.writeInt(this.privacy);
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public HeatFriendDetail createFromParcel(Parcel in) {
            return new HeatFriendDetail(in);
        }

        public HeatFriendDetail[] newArray(int size) {
            return new HeatFriendDetail[size];
        }
    };

    // GETTER SETTER//
}

To fix this issue Signal can be missed if doNotify called before doWait. So doNotify should mark somehow that it was called. The usual way for this is using a variable. Uncomment all usages of wasSignalled and the signal will not be missed.

hope this fix your issue Usually I'd say that you should go to File > Open File or Project... and select the .qmlproject and you're done, but support for this type of project file was disabled by default. If you try to do this now (I believe the change is in Creator 3.4), you'll just get an error message about Creator not supporting the mime type of the file, or something. Unfortunately, this is not a very useful error message for a beginner, and it won't tell you how to fix the problem.
If you want to use .qmlproject files in newer versions of Creator, you have to navigate to Help > About Plugins... and enable the QmlProjectManager plugin (it's under the Qt Quick section) by checking the box.

this will help I had the same problem after I had updated my Xcode to version 8.0.
My first error was "Project ERROR: Xcode not set up properly. You may need to confirm the license agreement by running /usr/bin/xcodebuild." To solve this problem, I created a symbolic link:

cd /Applications/Xcode.app/Contents/Developer/usr/bin/
sudo ln -s xcodebuild xcrun

lessThan(QMAKE_MAC_SDK_VERSION, "8.0"): \
    error("Current $$QMAKE_MAC_SDK SDK version ($$QMAKE_MAC_SDK_VERSION) is too old. Please upgrade Xcode.")

IPHONESIMULATOR_GENERIC_DESTINATION := "id=$(shell xcrun simctl list devices | grep -E 'iPhone|iPad' | grep -v unavailable | perl -lne 'print $$1 if /((.*?))/' | tail -n 1)"

IPHONESIMULATOR_GENERIC_DESTINATION := "id=$(shell xcrun simctl list devices | grep -E 'iPhone|iPad' | grep -v unavailable | awk 'match ($$0, /\(([A-F0-9\-]*\))/ ) { print substr ($$0, RSTART+1, RLENGTH-2) }' | tail -n 1)"

my $PNGCRUSH = `xcrun -f pngcrush`;

my $PNGCRUSH = `/usr/bin/xcrun -f pngcrush`;