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October 5, 2016 18:52
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Demonstrates how NSProgress handlers being invoked on any queue (as documented) might be problematic
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| #import <Foundation/Foundation.h> | |
| int main(int argc, char *argv[]) | |
| { | |
| @autoreleasepool | |
| { | |
| NSProgress *progress = [[NSProgress alloc] initWithParent:nil userInfo:nil]; | |
| progress.cancellationHandler = ^{ | |
| NSLog(@"cancel"); | |
| }; | |
| progress.resumingHandler = ^{ | |
| NSLog(@"resume"); | |
| }; | |
| for (int i = 0; i < 10; i++) | |
| { | |
| NSLog(@"- %2d -", i); | |
| [progress resume]; | |
| [progress cancel]; | |
| [progress resume]; | |
| [progress cancel]; | |
| NSLog(@"- %2d -", i); | |
| } | |
| dispatch_main(); | |
| } | |
| } |
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Sample output on El Capitan 10.11.6 (15G1004):
This behavior is documented, but welp.