A block invoked when the user presses the cancel button.
@property( atomic,
readwrite,
strong,
nullable ) void ( ^ cancel )( void );
If nil, the cancel button will not be shown.
Whether the progress is indeterminate. @disucssion This is used for the progress bar.
@property( atomic,
readwrite,
assign ) BOOL indeterminate;
The current progress. @disucssion This is used for the progress bar.
@property( atomic,
readwrite,
assign ) double progress;
The progress maximum value @disucssion This is used for the progress bar.
@property( atomic,
readwrite,
assign ) double progressMax;