笔记

最新推荐文章于 2025-09-26 13:13:51 发布

原创最新推荐文章于 2025-09-26 13:13:51 发布 · 742 阅读

0 ·

CC 4.0 BY-SA版权

文章标签：

#ios #objective-c

中国iOS开发 Objective-c 专栏收录该内容

18 篇文章

订阅专栏

本文详细介绍了如何使用Objective-C语言在单位时间内实现图片与View的动画效果，包括放大、透明度变化及随机移动。同时，文章还展示了如何修改返回键背景颜色、制作圆形头像及调整UI元素布局。此外，通过宏定义颜色和遍历字典的实例，进一步丰富了UI交互体验。最后，介绍了如何去除表格视图滚动条和直接旋转视图的方法，为开发者提供了全面的UI操作指南。

//单位时间内放大图片的动画
-(void)changeSize:(UIView*)tmp beginSize:(float)begins endSize:(float)ends time:(float)time{
    tmp.scale = begins;
    [UIView beginAnimations:nil context:tmp];
    [UIView setAnimationDuration:time];
    tmp.scale = ends;
    [UIView commitAnimations];
}
//单位时间内改变View的透明度
-(void)appear:(UIView*)tmp beginAlphaSize:(float)begins alphaEndSize:(float)ends time:(float)time{
    tmp.alpha = begins;
    [UIView beginAnimations:nil context:tmp];
    [UIView setAnimationDuration:time];
    tmp.alpha = ends;
    [UIView commitAnimations];
}

//获取当前系统的时间
    NSString* date;
    NSDateFormatter* formatter = [[NSDateFormatter alloc]init];
    [formatter setDateFormat:@"YYYY-MM-dd-hh:mm:ss:ms"];
    date = [formatter stringFromDate:[NSDate date]];
    NSLog(@"%@",date);

//修改左侧返回键的背景颜色
[[UIBarButtonItem appearance] setTintColor:[UIColor redColor]];

//图片随机移动
-(void)MoveRand:(UIView*)tmpView{
//    +[Utility getRandomNumber:-10 to:10]
    tmpView.point = CGPointMake(tmpView.point.x + [Utility getRandomNumber:-1 to:2], tmpView.point.y);
    [self performSelector:@selector(MoveRand:) withObject:tmpView afterDelay:0.5];

}

//数组随机排序
    NSArray    *array = [NSArray arrayWithObjects:@"1", @"2", @"3", @"4", @"5", nil];
    array = [array sortedArrayUsingComparator:(NSComparator)^(id obj1, id obj2) {
        return (arc4random() % 3) - 1;
    }];
    NSLog(@"array:%@", array);

//取出系统字体

    NSArray *familyNames = [UIFont familyNames];

    for( NSString *familyName in familyNames ){

        printf( "Family: %s \n", [familyName UTF8String] );

        NSArray *fontNames = [UIFont fontNamesForFamilyName:familyName];

        for( NSString *fontName in fontNames ){

            printf( "\tFont: %s \n", [fontName UTF8String] );

        }

    }

//宏定义颜色值
#define UIColorFromRGB(rgbValue) \
    [UIColor colorWithRed:((rgbValue >> 16) & 0xFF)/255.f \
                    green:((rgbValue >> 8) & 0xFF)/255.f \
                     blue:(rgbValue & 0xFF)/255.f \
                    alpha:1.0f]

view有一个属性layer，通过设置cornerRadius来设置圆角的半径，view是正方形的才能保证通过调整圆角半径来形成圆形头像

[view.layer setCornerRadius:CGRectGetHeight([view bounds]) / 2];
view.layer.masksToBounds = YES;
然后再给图层添加一个有色的边框，类似qq空间头像那样
view.layer.borderWidth = 5;
view.layer.borderColor = [[UIColor whiteColor] CGColor];
view.layer.contents = (id)[[UIImage imageNamed:@"backgroundImage.png"] CGImage];
这样就可以制作成圆形头像了，很实用的。

//去掉tableview滚动条
    _tableView.showsHorizontalScrollIndicator = NO;
    _tableView.showsVerticalScrollIndicator = NO;

//直接让self.view 旋转90°
#define degreesToRadinas(x) (M_PI * (x)/180.0)
self.view.transform=CGAffineTransformMakeRotation(degreesToRadinas(90));

//遍历字典
    NSEnumerator *keys=[applist keyEnumerator];
    id keyIndic=nil;
    NSString *indexKey;
    while ((keyIndic=[keys nextObject])!=nil) {
//        id valueForkey=[applist objectForKey:keyIndic];
        NSLog(@"++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++key=%@",keyIndic);
        indexKey=keyIndic;
    }

//枚举数组
[arry enumerateObjectsUsingBlock:^(NSDictionary *dic, NSUInteger idx, BOOL *stop)
    {
        NSLog(@"object(%lu)'s description is %@",(unsigned long)idx, [dic description]);
    }
     ];

//可变数组申请内存
BtnTagArray = [[NSMutableArray alloc] initWithCapacity:1];