feat(module:modal): provide open & close & setConfirmLoading function (…

…#125)

use #modal.open() instead of set nzVisible=true
use #modal.close() instead of set nzVisible=false
use #modal.setConfirmLoading(loading:boolean) instead of set confirmLoading

close #118

src/components/modal/nz-modal.component.ts

@@ -292,6 +292,18 @@ export class NzModalComponent implements OnInit, OnDestroy, AfterViewInit {
     }
   }
 
+  setConfirmLoading(loading: boolean): void {
+    this.nzConfirmLoading = loading;
+  }
+
+  open(): void {
+    this.nzVisible = true;
+  }
+
+  close(): void {
+    this.nzVisible = false;
+  }
+
   clickOk(e): void {
     if (this.nzOnOk) {
       this.nzOnOk.emit(e);