UIActivityIndicatorView官方文档及使用

UIActivityIndicatorView

（1）继承UIView，使用activity indicator指示一个任务正在进行中，展现为旋转的小菊花，

Initializing an Activity Indicator


- initWithActivityIndicatorStyle: 


Managing an Activity Indicator


- startAnimating 

 stopAnimating 

- isAnimating 

hidesWhenStopped 


Configuring the Activity Indicator Appearance


activityIndicatorViewStyle Property

color Property

Data Types


UIActivityIndicatorViewStyle 

typedef enum {

UIActivityIndicatorViewStyleWhiteLarge,

UIActivityIndicatorViewStyleWhite,

UIActivityIndicatorViewStyleGray,

} UIActivityIndicatorViewStyle;

使用

首先声明一个，然后初始化配置

activityIndicator3 = [[UIActivityIndicatorView alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 32.0f, 32.0f)];

[activityIndicator3 setCenter:viewLoading3.center];

[activityIndicator3 setActivityIndicatorViewStyle:UIActivityIndicatorViewStyleWhite];

[viewLoading3 addSubview:activityIndicator3];

activityIndicator3.color=[UIColor blackColor];

[activityIndicator3 startAnimating];

用完之后调用 stopAnimating