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私がやろうとしているのは、プログラムで画面の左上隅にUIView長方形を作成し、それを右上、右下、左下に移動し、最後に左上に戻すことです。しかし、意図したとおりに機能しません。私のコードの何が問題になっていますか？

#import "ViewController.h"

@interface ViewController ()
@property (nonatomic,strong) UIView *myView;
@end

@implementation ViewController
@synthesize myView = _myView;


- (IBAction)animation:(UIButton *)sender {
    [UIView animateWithDuration:3.0 animations:^{
        self.myView.alpha = 0.75;
        self.myView.frame = CGRectMake(160, 0, 160,230);}];

    [UIView animateWithDuration:3.0 animations:^{
        self.myView.alpha = 0.50;
        self.myView.frame = CGRectMake(160, 230, 160,230);}];

     [UIView animateWithDuration:3.0 animations:^{
     self.myView.alpha = 0.25;
     self.myView.frame = CGRectMake(0, 230, 160,230);}];

     [UIView animateWithDuration:3.0 animations:^{
     self.myView.alpha = 0.00;
     self.myView.frame = CGRectMake(0, 0, 160,230);}
     completion:^(BOOL finished) {
     [self.myView removeFromSuperview];
     }];

}


- (void)viewDidLoad
{
    [super viewDidLoad];
    CGRect viewRect = CGRectMake(0, 0, 160, 230);
    UIView *mv = [[UIView alloc] initWithFrame:viewRect];
    self.myView = mv;
    self.myView.backgroundColor = [UIColor redColor];
    [self.view addSubview:self.myView];

}
@end

編集：ネストされた完了ブロックの問題を修正します：

- (IBAction)animation:(UIButton *)sender {
    [UIView animateWithDuration:3.0 animations:^{
        self.myView.alpha = 0.75;
        self.myView.frame = CGRectMake(160, 0, 160,230);}
     completion:^(BOOL finished) {
         [UIView animateWithDuration:3.0 animations:^{
             self.myView.alpha = 0.50;
             self.myView.frame = CGRectMake(160, 230, 160,230);}
          completion:^(BOOL finished) {
              [UIView animateWithDuration:3.0 animations:^{
                  self.myView.alpha = 0.25;
                  self.myView.frame = CGRectMake(0, 230, 160,230);}
          completion:^(BOOL finished) {
              [UIView animateWithDuration:3.0 animations:^{
                  self.myView.alpha = 0.00;
                  self.myView.frame = CGRectMake(0, 0, 160,230);}
                               completion:^(BOOL finished) {
                                   [self.myView removeFromSuperview];
          }];}];}];}];}

しかし、読むのはひどいです。他に方法はありますか？

4

1 に答える 1

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これは特定のアニメーションではありませんが、このパターンを試して、アニメーションのパーツを次々に起動させる必要があります。

[UIView animateWithDuration:3.0 animations:^{
    // first part of the animation
} completion:^(BOOL finished) {
    [UIView animateWithDuration:3.0 animations:^{
        // second part of animation
    } completion:^(BOOL finished) {
        [UIView animateWithDuration:3.0 animations:^{
            // third part of the animation
        } completion:^(BOOL finished) {
            [UIView animateWithDuration:3.0 animations:^{
                // forth part of the animation
            } completion:^(BOOL finished) {
                // finish and clear the animation
            }];
        }];
    }];
}];
于 2012-08-30T22:44:59.070 に答える