IOS中UIWebView加载Loading的实现方法
程序员文章站
2022-06-09 19:43:17
第一种方法：使用uiview and uiactivityindicatorview
复制代码 代码如下:
//创建uiwebview
webview = [[uiw...
第一种方法：使用uiview and uiactivityindicatorview
复制代码 代码如下:
//创建uiwebview
webview = [[uiwebview alloc] initwithframe:cgrectmake(0, 44, 320, 400)];
[webview setuserinteractionenabled:no];
[webview setbackgroundcolor:[uicolor clearcolor]];
[webview setdelegate:self];
[webview setopaque:no];//使网页透明
nsstring *path = @"";
nsurl *url = [nsurl urlwithstring:path];
[webview loadrequest:[nsurlrequest requestwithurl:url]];
//创建uiactivityindicatorview背底半透明view
uiview *view = [[uiview alloc] initwithframe:cgrectmake(0, 0, 320, 480)];
[view settag:103];
[view setbackgroundcolor:[uicolor blackcolor]];
[view setalpha:0.8];
[self.view addsubview:view];
activityindicator = [[uiactivityindicatorview alloc] initwithframe:cgrectmake(0.0f, 0.0f, 32.0f, 32.0f)];
[activityindicator setcenter:view.center];
[activityindicator setactivityindicatorviewstyle:uiactivityindicatorviewstylewhite];
[view addsubview:activityindicator];
[self.view addsubview:webview];
[view release];
[webview release];
//开始加载数据
- (void)webviewdidstartload:(uiwebview *)webview {
[activityindicator startanimating];
}
//数据加载完
- (void)webviewdidfinishload:(uiwebview *)webview {
[activityindicator stopanimating];
uiview *view = (uiview *)[self.view viewwithtag:103];
[view removefromsuperview];
}
第二种方法：使用uialertview and uiactivityindicatorview
复制代码 代码如下:
//加载网页动画
- (void)webviewdidstartload:(uiwebview *)webview{
if (myalert==nil){
myalert = [[uialertview alloc] initwithtitle:nil
message: @"读取中..."
delegate: self
cancelbuttontitle: nil
otherbuttontitles: nil];
uiactivityindicatorview *activityview = [[uiactivityindicatorview alloc] initwithactivityindicatorstyle:uiactivityindicatorviewstylewhite];
activityview.frame = cgrectmake(120.f, 48.0f, 38.0f, 38.0f);
[myalert addsubview:activityview];
[activityview startanimating];
[myalert show];
}
}
- (void)webviewdidfinishload:(uiwebview *)webview{
[myalert dismisswithclickedbuttonindex:0 animated:yes];
}
方法三：使用uiwebview来加载gif图片，除非你要用到webview,不然就不要使用这种方式来实现
复制代码 代码如下:
nsdata *gif = [nsdata datawithcontentsoffile: [[nsbundle mainbundle] pathforresource:@"1" oftype:@"gif"]];
// view生成
uiwebview *webview = [[uiwebview alloc] initwithframe:cgrectmake(100, 100, 70, 30)];
webview.userinteractionenabled = no;//用户不可交互
[webview loaddata:gif mimetype:@"image/gif" textencodingname:nil baseurl:nil];
[self.view addsubview:webview];
以上所述就是本文的全部内容了，希望大家能够喜欢。