diff --git a/src/plugins/qmldesigner/components/formeditor/movemanipulator.cpp b/src/plugins/qmldesigner/components/formeditor/movemanipulator.cpp
index 0de06fc3608..c2df77b16bc 100644
--- a/src/plugins/qmldesigner/components/formeditor/movemanipulator.cpp
+++ b/src/plugins/qmldesigner/components/formeditor/movemanipulator.cpp
@@ -181,9 +181,9 @@ QPointF MoveManipulator::findSnappingOffset(const QHash<FormEditorItem*, QRectF>
     QMap<double, double> verticalOffsetMap;
     QMap<double, double> horizontalOffsetMap;
 
-    QHashIterator<FormEditorItem*, QRectF> hashIterator(boundingRectHash);
-    while (hashIterator.hasNext()) {
-        hashIterator.next();
+    for (auto hashIterator = boundingRectHash.cbegin(), end = boundingRectHash.cend();
+              hashIterator != end;
+              ++hashIterator) {
         FormEditorItem *formEditorItem = hashIterator.key();
         QRectF boundingRect = hashIterator.value();
 
@@ -230,10 +230,10 @@ QHash<FormEditorItem*, QRectF> MoveManipulator::tanslatedBoundingRects(const QHa
 {
     QHash<FormEditorItem*, QRectF> translatedBoundingRectHash;
 
-    QHashIterator<FormEditorItem*, QRectF> hashIterator(boundingRectHash);
-    while (hashIterator.hasNext()) {
+    for (auto hashIterator = boundingRectHash.cbegin(), end = boundingRectHash.cend();
+              hashIterator != end;
+              ++hashIterator) {
         QPointF alignedOffset(offsetVector);
-        hashIterator.next();
         FormEditorItem *formEditorItem = hashIterator.key();
         QRectF boundingRect = transform.mapRect(hashIterator.value());
 
diff --git a/src/plugins/qmldesigner/components/formeditor/resizeindicator.cpp b/src/plugins/qmldesigner/components/formeditor/resizeindicator.cpp
index 55f80798d78..bc4c95232c0 100644
--- a/src/plugins/qmldesigner/components/formeditor/resizeindicator.cpp
+++ b/src/plugins/qmldesigner/components/formeditor/resizeindicator.cpp
@@ -42,19 +42,14 @@ ResizeIndicator::~ResizeIndicator()
 
 void ResizeIndicator::show()
 {
-    QHashIterator<FormEditorItem*, ResizeController> itemControllerIterator(m_itemControllerHash);
-    while (itemControllerIterator.hasNext()) {
-        ResizeController controller = itemControllerIterator.next().value();
+    for (ResizeController controller : m_itemControllerHash)
         controller.show();
-    }
 }
+
 void ResizeIndicator::hide()
 {
-    QHashIterator<FormEditorItem*, ResizeController> itemControllerIterator(m_itemControllerHash);
-    while (itemControllerIterator.hasNext()) {
-        ResizeController controller = itemControllerIterator.next().value();
+    for (ResizeController controller : m_itemControllerHash)
         controller.hide();
-    }
 }
 
 void ResizeIndicator::clear()
diff --git a/src/plugins/qmldesigner/components/formeditor/snapper.cpp b/src/plugins/qmldesigner/components/formeditor/snapper.cpp
index eec5c3ab1ef..361a8a46b42 100644
--- a/src/plugins/qmldesigner/components/formeditor/snapper.cpp
+++ b/src/plugins/qmldesigner/components/formeditor/snapper.cpp
@@ -311,9 +311,9 @@ QList<QLineF> Snapper::findSnappingLines(const SnapLineMap &snappingLineMap,
 {
     QList<QLineF> lineList;
 
-    SnapLineMapIterator snappingLineIterator(snappingLineMap);
-    while (snappingLineIterator.hasNext()) {
-        snappingLineIterator.next();
+    for (auto snappingLineIterator = snappingLineMap.cbegin(), end = snappingLineMap.cend();
+              snappingLineIterator != end;
+              ++snappingLineIterator) {
 
         if (compareLines(snapLine, snappingLineIterator.key())) { // near distance snapping lines
             lineList += createSnapLine(orientation,
@@ -339,9 +339,9 @@ QList<QLineF> Snapper::findSnappingOffsetLines(const SnapLineMap &snappingOffset
 {
     QList<QLineF> lineList;
 
-    SnapLineMapIterator snappingOffsetIterator(snappingOffsetMap);
-    while (snappingOffsetIterator.hasNext()) {
-        snappingOffsetIterator.next();
+    for (auto snappingOffsetIterator = snappingOffsetMap.cbegin(), end = snappingOffsetMap.cend();
+              snappingOffsetIterator != end;
+              ++snappingOffsetIterator) {
 
         const QRectF &formEditorItemRect(snappingOffsetIterator.value().first);
         double formEditorItemRectLowerLimit;
@@ -377,9 +377,9 @@ double Snapper::snappedOffsetForLines(const SnapLineMap &snappingLineMap,
 {
     QMultiMap<double, double> minimumSnappingLineMap;
 
-    SnapLineMapIterator snappingLineIterator(snappingLineMap);
-    while (snappingLineIterator.hasNext()) {
-        snappingLineIterator.next();
+    for (auto snappingLineIterator = snappingLineMap.cbegin(), end = snappingLineMap.cend();
+              snappingLineIterator != end;
+              ++snappingLineIterator) {
         double snapLine = snappingLineIterator.key();
         double offset = value - snapLine;
         double distance = qAbs(offset);
@@ -403,9 +403,9 @@ double Snapper::snappedOffsetForOffsetLines(const SnapLineMap &snappingOffsetMap
 {
     QMultiMap<double, double> minimumSnappingLineMap;
 
-    SnapLineMapIterator snappingOffsetIterator(snappingOffsetMap);
-    while (snappingOffsetIterator.hasNext()) {
-        snappingOffsetIterator.next();
+    for (auto snappingOffsetIterator = snappingOffsetMap.cbegin(), end = snappingOffsetMap.cend();
+              snappingOffsetIterator != end;
+              ++snappingOffsetIterator) {
         double snapLine = snappingOffsetIterator.key();
         const QRectF &formEditorItemRect(snappingOffsetIterator.value().first);
         double formEditorItemRectLowerLimit;
@@ -492,13 +492,12 @@ static QList<QLineF> mergedHorizontalLines(const QList<QLineF> &lineList)
     });
 
     QList<QLineF> lineWithTheSameY;
-    QListIterator<QLineF>  sortedLineListIterator(sortedLineList);
-    while (sortedLineListIterator.hasNext()) {
-        QLineF line = sortedLineListIterator.next();
+    for (int i = 0, n = sortedLineList.size(); i < n; ++i) {
+        QLineF line = sortedLineList.at(i);
         lineWithTheSameY.append(line);
 
-        if (sortedLineListIterator.hasNext()) {
-            QLineF nextLine = sortedLineListIterator.peekNext();
+        if (i + 1 < n) {
+            QLineF nextLine = sortedLineList.at(i + 1);
             if (!qFuzzyCompare(line.y1(), nextLine.y1())) {
                 mergedLineList.append(mergedHorizontalLine(lineWithTheSameY));
                 lineWithTheSameY.clear();
@@ -521,13 +520,12 @@ static QList<QLineF> mergedVerticalLines(const QList<QLineF> &lineList)
     });
 
     QList<QLineF> lineWithTheSameX;
-    QListIterator<QLineF>  sortedLineListIterator(sortedLineList);
-    while (sortedLineListIterator.hasNext()) {
-        QLineF line = sortedLineListIterator.next();
+    for (int i = 0, n = sortedLineList.size(); i < n; ++i) {
+        QLineF line = sortedLineList.at(i);
         lineWithTheSameX.append(line);
 
-        if (sortedLineListIterator.hasNext()) {
-            QLineF nextLine = sortedLineListIterator.peekNext();
+        if (i + 1 < n) {
+            QLineF nextLine = sortedLineList.at(i + 1);
             if (!qFuzzyCompare(line.x1(), nextLine.x1())) {
                 mergedLineList.append(mergedVerticalLine(lineWithTheSameX));
                 lineWithTheSameX.clear();
@@ -565,9 +563,9 @@ static QmlItemNode findItemOnSnappingLine(const QmlItemNode &sourceQmlItemNode,
     else
         compareAnchorLineType = AnchorLineLeft;
 
-    SnapLineMapIterator  snapLineIterator(snappingLines);
-    while (snapLineIterator.hasNext()) {
-        snapLineIterator.next();
+    for (auto snapLineIterator = snappingLines.cbegin(), end = snappingLines.cend();
+              snapLineIterator != end;
+              ++snapLineIterator) {
         double snapLine = snapLineIterator.key();
 
         if (qAbs(snapLine - anchorLine ) < 1.0) {
diff --git a/src/plugins/qmldesigner/components/formeditor/snappinglinecreator.h b/src/plugins/qmldesigner/components/formeditor/snappinglinecreator.h
index aba0a52444d..032426629b0 100644
--- a/src/plugins/qmldesigner/components/formeditor/snappinglinecreator.h
+++ b/src/plugins/qmldesigner/components/formeditor/snappinglinecreator.h
@@ -32,7 +32,6 @@ namespace QmlDesigner {
 class FormEditorItem;
 
 using SnapLineMap = QMultiMap<double, QPair<QRectF, FormEditorItem*> >;
-using SnapLineMapIterator = QMapIterator<double, QPair<QRectF, FormEditorItem*> >;
 
 class FormEditorItem;
 
diff --git a/src/plugins/qmldesigner/components/pathtool/pathitem.cpp b/src/plugins/qmldesigner/components/pathtool/pathitem.cpp
index f8e3b5549c3..602666e8951 100644
--- a/src/plugins/qmldesigner/components/pathtool/pathitem.cpp
+++ b/src/plugins/qmldesigner/components/pathtool/pathitem.cpp
@@ -104,9 +104,9 @@ void PathItem::writeCubicPath(const ModelNode &pathNode, const CubicSegment &cub
 
 void PathItem::writePathAttributes(const ModelNode &pathNode, const QMap<QString, QVariant> &attributes)
 {
-    QMapIterator<QString, QVariant> attributesIterator(attributes);
-    while (attributesIterator.hasNext()) {
-        attributesIterator.next();
+    for (auto attributesIterator = attributes.cbegin(), end = attributes.cend();
+              attributesIterator != end;
+              ++attributesIterator) {
         QList<QPair<PropertyName, QVariant> > propertyList;
         propertyList.append(PropertyPair("name", attributesIterator.key()));
         propertyList.append(PropertyPair("value", attributesIterator.value()));
diff --git a/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp b/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp
index c48bfedce1b..f316200dcc5 100644
--- a/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp
+++ b/src/plugins/qmldesigner/designercore/instances/nodeinstanceview.cpp
@@ -204,8 +204,8 @@ void NodeInstanceView::modelAboutToBeDetached(Model * model)
 
 void NodeInstanceView::handleCrash()
 {
-    int elaspsedTimeSinceLastCrash = m_lastCrashTime.restart();
-    int forceRestartTime = 2000;
+    qint64 elaspsedTimeSinceLastCrash = m_lastCrashTime.restart();
+    qint64 forceRestartTime = 2000;
 #ifdef QT_DEBUG
     forceRestartTime = 4000;
 #endif
@@ -816,9 +816,10 @@ CreateSceneCommand NodeInstanceView::createCreateSceneCommand()
         bindingPropertyList.append(node.bindingProperties());
         if (node.isValid() && hasInstanceForModelNode(node)) {
             NodeInstance instance = instanceForModelNode(node);
-            QHashIterator<PropertyName, QVariant> auxiliaryIterator(node.auxiliaryData());
-            while (auxiliaryIterator.hasNext()) {
-                auxiliaryIterator.next();
+            const QHash<PropertyName, QVariant> aux = node.auxiliaryData();
+            for (auto auxiliaryIterator = aux.cbegin(), end = aux.cend();
+                      auxiliaryIterator != end;
+                      ++auxiliaryIterator) {
                 PropertyValueContainer container(instance.instanceId(), auxiliaryIterator.key(), auxiliaryIterator.value(), TypeName());
                 auxiliaryContainerVector.append(container);
             }
diff --git a/src/plugins/qmldesigner/designercore/model/model.cpp b/src/plugins/qmldesigner/designercore/model/model.cpp
index 981524b3095..960ad32aed3 100644
--- a/src/plugins/qmldesigner/designercore/model/model.cpp
+++ b/src/plugins/qmldesigner/designercore/model/model.cpp
@@ -502,11 +502,8 @@ QMultiHash<ModelNode, InformationName> convertModelNodeInformationHash(const QMu
 {
     QMultiHash<ModelNode, InformationName>  convertedModelNodeInformationHash;
 
-    QHashIterator<ModelNode, InformationName> hashIterator(informationChangeHash);
-    while (hashIterator.hasNext()) {
-        hashIterator.next();
-        convertedModelNodeInformationHash.insert(ModelNode(hashIterator.key(), view), hashIterator.value());
-    }
+    for (auto it = informationChangeHash.cbegin(), end = informationChangeHash.cend(); it != end; ++it)
+        convertedModelNodeInformationHash.insert(ModelNode(it.key(), view), it.value());
 
     return convertedModelNodeInformationHash;
 }
diff --git a/src/plugins/qmldesigner/designercore/model/modelnodepositionstorage.cpp b/src/plugins/qmldesigner/designercore/model/modelnodepositionstorage.cpp
index 69a3849062b..0c7615c7d4c 100644
--- a/src/plugins/qmldesigner/designercore/model/modelnodepositionstorage.cpp
+++ b/src/plugins/qmldesigner/designercore/model/modelnodepositionstorage.cpp
@@ -37,9 +37,7 @@ void ModelNodePositionStorage::cleanupInvalidOffsets()
 {
     QHash<ModelNode, RewriterData> validModelNodes;
 
-    QHashIterator<ModelNode, RewriterData> iter(m_rewriterData);
-    while (iter.hasNext()) {
-        iter.next();
+    for (auto iter = m_rewriterData.cbegin(), end = m_rewriterData.cend(); iter != end; ++iter) {
         const ModelNode modelNode = iter.key();
         if (modelNode.isValid())
             validModelNodes.insert(modelNode, iter.value());
diff --git a/src/plugins/qmldesigner/designercore/model/rewriteactioncompressor.cpp b/src/plugins/qmldesigner/designercore/model/rewriteactioncompressor.cpp
index 3c111471a61..d84b088db85 100644
--- a/src/plugins/qmldesigner/designercore/model/rewriteactioncompressor.cpp
+++ b/src/plugins/qmldesigner/designercore/model/rewriteactioncompressor.cpp
@@ -67,10 +67,8 @@ void RewriteActionCompressor::compressImports(QList<RewriteAction *> &actions) c
     QHash<Import, RewriteAction *> addedImports;
     QHash<Import, RewriteAction *> removedImports;
 
-    QMutableListIterator<RewriteAction *> iter(actions);
-    iter.toBack();
-    while (iter.hasPrevious()) {
-        RewriteAction *action = iter.previous();
+    for (int i = actions.size(); --i >= 0; ) {
+        RewriteAction *action = actions.at(i);
 
         if (RemoveImportRewriteAction *removeImportAction = action->asRemoveImportRewriteAction()) {
             const Import import = removeImportAction->import();
@@ -113,10 +111,8 @@ void RewriteActionCompressor::compressRereparentActions(QList<RewriteAction *> &
     QList<RewriteAction *> actionsToRemove;
     QHash<ModelNode, ReparentNodeRewriteAction *> reparentedNodes;
 
-    QMutableListIterator<RewriteAction*> iter(actions);
-    iter.toBack();
-    while (iter.hasPrevious()) {
-        RewriteAction *action = iter.previous();
+    for (int i = actions.size(); --i >= 0; ) {
+        RewriteAction *action = actions.at(i);
 
         if (ReparentNodeRewriteAction *reparentAction = action->asReparentNodeRewriteAction()) {
             const ModelNode reparentedNode = reparentAction->reparentedNode();
@@ -139,10 +135,9 @@ void RewriteActionCompressor::compressRereparentActions(QList<RewriteAction *> &
 void RewriteActionCompressor::compressReparentIntoSamePropertyActions(QList<RewriteAction *> &actions) const
 {
     QList<RewriteAction *> actionsToRemove;
-    QMutableListIterator<RewriteAction *> iter(actions);
-    iter.toBack();
-    while (iter.hasPrevious()) {
-        RewriteAction *action = iter.previous();
+
+    for (int i = actions.size(); --i >= 0; ) {
+        RewriteAction *action = actions.at(i);
 
         if (ReparentNodeRewriteAction *reparentAction = action->asReparentNodeRewriteAction()) {
             if (reparentAction->targetProperty() == reparentAction->oldParentProperty())
@@ -161,10 +156,8 @@ void RewriteActionCompressor::compressAddEditRemoveNodeActions(QList<RewriteActi
     QList<RewriteAction *> actionsToRemove;
     QHash<ModelNode, RewriteAction *> removedNodes;
 
-    QMutableListIterator<RewriteAction*> iter(actions);
-    iter.toBack();
-    while (iter.hasPrevious()) {
-        RewriteAction *action = iter.previous();
+    for (int i = actions.size(); --i >= 0; ) {
+        RewriteAction *action = actions.at(i);
 
         if (RemoveNodeRewriteAction *removeNodeAction = action->asRemoveNodeRewriteAction()) {
             const ModelNode modelNode = removeNodeAction->node();
@@ -220,10 +213,8 @@ void RewriteActionCompressor::compressPropertyActions(QList<RewriteAction *> &ac
     QHash<AbstractProperty, ChangePropertyRewriteAction *> changedProperties;
     QHash<AbstractProperty, AddPropertyRewriteAction *> addedProperties;
 
-    QMutableListIterator<RewriteAction*> iter(actions);
-    iter.toBack();
-    while (iter.hasPrevious()) {
-        RewriteAction *action = iter.previous();
+    for (int i = actions.size(); --i >= 0; ) {
+        RewriteAction *action = actions.at(i);
 
         if (RemovePropertyRewriteAction *removeAction = action->asRemovePropertyRewriteAction()) {
             const AbstractProperty property = removeAction->property();
@@ -271,10 +262,7 @@ void RewriteActionCompressor::compressAddEditActions(QList<RewriteAction *> &act
     QSet<ModelNode> addedNodes;
     QSet<RewriteAction *> dirtyActions;
 
-    QMutableListIterator<RewriteAction*> iter(actions);
-    while (iter.hasNext()) {
-        RewriteAction *action = iter.next();
-
+    for (RewriteAction *action : qAsConst(actions)) {
         if (action->asAddPropertyRewriteAction() || action->asChangePropertyRewriteAction()) {
             AbstractProperty property;
             ModelNode containedNode;
@@ -343,10 +331,8 @@ void RewriteActionCompressor::compressAddReparentActions(QList<RewriteAction *>
     QList<RewriteAction *> actionsToRemove;
     QMap<ModelNode, RewriteAction*> addedNodes;
 
-    QMutableListIterator<RewriteAction*> iter(actions);
-    while (iter.hasNext()) {
-        RewriteAction *action = iter.next();
-
+    for (int i = 0, n = actions.size(); i < n; ++i) {
+        RewriteAction *action = actions.at(i);
         if (action->asAddPropertyRewriteAction() || action->asChangePropertyRewriteAction()) {
             ModelNode containedNode;
 
@@ -377,7 +363,7 @@ void RewriteActionCompressor::compressAddReparentActions(QList<RewriteAction *>
                                                                      changeAction->containedModelNode());
                 }
 
-                iter.setValue(replacementAction);
+                actions[i] = replacementAction;
                 delete action;
             }
         }
diff --git a/src/plugins/qmldesigner/documentmanager.cpp b/src/plugins/qmldesigner/documentmanager.cpp
index d264f286cce..45fd4957590 100644
--- a/src/plugins/qmldesigner/documentmanager.cpp
+++ b/src/plugins/qmldesigner/documentmanager.cpp
@@ -96,9 +96,9 @@ static inline void applyProperties(ModelNode &node, const QHash<PropertyName, QV
             node.setAuxiliaryData(propertyName, QVariant());
     }
 
-    QHashIterator<PropertyName, QVariant> propertyIterator(propertyHash);
-    while (propertyIterator.hasNext()) {
-        propertyIterator.next();
+    for (auto propertyIterator = propertyHash.cbegin(), end = propertyHash.cend();
+              propertyIterator != end;
+              ++propertyIterator) {
         const PropertyName propertyName = propertyIterator.key();
         if (propertyName == "width" || propertyName == "height") {
             node.setAuxiliaryData(propertyIterator.key(), propertyIterator.value());