ios 自定義載入動畫效果

在開發過程中，可能會遇到各種不同的場景需要等待載入成功後才能顯示數據。以下是自定義的一個動畫載入view效果。

在UIViewController的中載入等到效果，如下

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //將view背景顏色變更為黃色
    self.view.backgroundColor = [UIColor yellowColor];
    
    //在self.view上載入提示框
    [[BIDActivityNote sharedInstance] AddActivityView:self.view];
    
    //延時3分鐘後移除提示框
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [[BIDActivityNote sharedInstance] RemoveActivityView];
    });
}

BIDActivityNote.h 實現代碼

//
//  BIDActivityNote.h
//  MobileShop
//
//  Created by eJiupi on 15-7-23.
//  Copyright (c) 2014年 xujinzhong. All rights reserved.
//

#import <Foundation/Foundation.h>

@interface BIDActivityNote : NSObject

+ (BIDActivityNote*)sharedInstance;

- (void)AddActivityView:(UIView*)subView;

- (void)RemoveActivityView;

@end

BIDActivityNote.m 代碼實現效果：

//
//  BIDActivityNote.m
//  MobileShop
//
//  Created by eJiupi on 15-7-23.
//  Copyright (c) 2014年 xujinzhong. All rights reserved.
//

#import "BIDActivityNote.h"

@interface BIDActivityNote ()

@property (strong, nonatomic) UIView *subView;
@property (strong, nonatomic) UIActivityIndicatorView *act;

@end

@implementation BIDActivityNote

+ (BIDActivityNote*)sharedInstance
{
    static BIDActivityNote* instance = nil;
    if (instance == nil)
    {
        instance = [[BIDActivityNote alloc] init];
    }
    return instance;
}

- (id)init
{
    self = [super init];
    if (self)
    {
        NSInteger w = [UIScreen mainScreen].bounds.size.width;
        NSInteger h = [UIScreen mainScreen].bounds.size.height;
        self.subView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, w, h)];
        self.subView.backgroundColor = [UIColor colorWithRed:0 green:0 blue:0 alpha:0.5];

        self.act = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
        //只能設置中心，不能設置大小
        self.act.center = CGPointMake(w/2.f, h/2.f);
        //設置活動指示器的顏色
        self.act.color=[UIColor whiteColor];
        
        [self.act startAnimating]; // 開始旋轉
        [self.act stopAnimating]; // 結束旋轉
        //[self.act setHidesWhenStopped:YES]; //當旋轉結束時隱藏
        
        [self.subView addSubview:self.act];
    }
    return self;
}

- (void)AddActivityView:(UIView*)subView
{
    //啟動
    [self.act startAnimating];
    [subView addSubview:self.subView];
    
    //實現動畫效果
    self.subView.transform = CGAffineTransformScale(self.subView.transform, 0, 0);
    [UIView animateWithDuration:2 animations:^{
        self.subView.transform = CGAffineTransformIdentity;
    }]; 
}

- (void)RemoveActivityView
{
    [UIView animateWithDuration:0.7 animations:^{
        self.subView.transform = CGAffineTransformScale(self.subView.transform, 0, 0);
    } completion:^(BOOL bfinished){
        if (bfinished) {
            //停止
            [self.act stopAnimating];
            [self.subView removeFromSuperview];
        }
    }];
}

@end