iphone - 如何从 UIImageView 创建 UIImage？

Question

我正在尝试在我的应用程序上实现一组动画图像。

NSArray *myImages = [NSArray arrayWithObjects:
    [UIImage imageNamed:@"myImage1.png"],
    [UIImage imageNamed:@"myImage2.png"],
    [UIImage imageNamed:@"myImage3.png"],
    [UIImage imageNamed:@"myImage4.gif"],
    nil];

UIImageView *myAnimatedView = [UIImageView alloc];
[myAnimatedView initWithFrame:[self bounds]];
myAnimatedView.animationImages = myImages;
myAnimatedView.animationDuration = 0.25; // seconds
myAnimatedView.animationRepeatCount = 0; // 0 = loops forever
[myAnimatedView startAnimating];
[self addSubview:myAnimatedView];
[myAnimatedView release];

好的，但问题是我正在使用 API 函数在地图上放置标记。

该功能如下：

RMMarker *newMarker;
UIImage *blueMarkerImage = [UIImage imageNamed:@"marker.png"];
newMarker = [[RMMarker alloc] initWithUIImage:blueMarkerImage anchorPoint:CGPointMake(0.5, 1.0)];


[mapView.contents.markerManager addMarker:newMarker AtLatLong:position];
[newMarker release];

问题是“initWithUIImage：”仅适用于 UIImage，不适用于 UIImageView。

那么，我该如何解决呢？

更新：我的新代码不起作用：

NSArray *myImages = [NSArray arrayWithObjects:                           
                         [UIImage imageNamed:@"marker0.png"],
                         [UIImage imageNamed:@"marker1.png"],
                         [UIImage imageNamed:@"marker2.png"],
                         [UIImage imageNamed:@"marker3.png"],
                         [UIImage imageNamed:@"marker4.png"],
                         nil];

    UIImageView *myAnimatedView = [UIImageView alloc];
    myAnimatedView.animationImages = myImages;
    myAnimatedView.animationDuration = 10; // seconds
    myAnimatedView.animationRepeatCount = 1; // 0 = loops forever
    [myAnimatedView startAnimating];
    RMMarker *newMarker = [[RMMarker alloc] initWithUIImage:[myAnimatedView image] anchorPoint:CGPointMake(0.5, 1.0)];
    [mapView.contents.markerManager addMarker:newMarker AtLatLong:markerPosition];

Answer 1

UIImageView *myAnimatedView = [UIImageView alloc] 

这可能只是一个复制/粘贴错误，但您忘记了初始化。

UIImageView *myAnimatedView = [[[UIImageView alloc] initWithFrame:[self bounds]] autorelease]

Answer 2

您可以尝试使用image来自的消息UIImageView：

 newMarker = 
     [
          [RMMarker alloc] 
              initWithUIImage:[myAnimatedView image] 
              anchorPoint:CGPointMake(0.5, 1.0)
     ];

或者，如果您需要创建一个，UIImageView那么您可以尝试：

 UIImageView *newMakerImageView = 
     [[UIImageView alloc] initWithImage:
        [
          [RMMarker alloc] 
              initWithUIImage:yourImageHere
              anchorPoint:CGPointMake(0.5, 1.0)
        ]
     ];