- initWithParent:userInfo:
+ discreteProgressWithTotalUnitCount:
+ progressWithTotalUnitCount:parent:pendingUnitCount:
Availability 有効性
Technology
+ (NSProgress
*)progressWithTotalUnitCount:(int64_t)unitCount;
unitCount
The total number of units of work to assign to the progress instance.
If a current progress object exists, the initializer uses it to set the value of the total
property.
In many cases, you can precede code that does a substantial amount of work with an invocation of this method, then repeatedly set the completed
or cancelled
property in the loop that does the work.
You can invoke this method on one thread and then message the returned NSProgress
on another thread. For example, you can capture the created progress instance in a block that you pass to dispatch
. In that block, you can invoke methods like become
or resign
, and set the completed
or cancelled
properties as your app finishes its work.
- initWithParent:userInfo:
+ discreteProgressWithTotalUnitCount:
+ progressWithTotalUnitCount:parent:pendingUnitCount: