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1.UICollectionView横向滚动到某个item

[_collectionViewscrollToItemAtIndexPath:indexPathatScrollPosition:UICollectionViewScrollPositionNoneanimated:NO];

如果collectionView使用xib拖的,并且加了约束,需要给collectionView的frame赋值

2.button字体左对齐

[_deleteBtn setContentHorizontalAlignment:UIControlContentHorizontalAlignmentLeft];

3.collectionView左右缩进

layout.sectionInset = UIEdgeInsetsMake(0, 15, 0, 15);

4.在做屏幕旋转的时候,

5.在做masonry动画时,会遇到动画过程中所有的子视图都跟着动画,且动画变形的效果,这时候在动画之前要先加上[subview.superView layoutIfNeeded], 然后在做masonry动画.

6.OCLint编译

(1)编译工程

xcodebuild -workspace YuneecApp.xcworkspace -scheme YuneecApp clean build | tee xcodebuild.log | xcpretty --report json-compilation-database

(2)将文件移到根目录

mv build/reports/compilation_db.json  compile_commands.json

(3)将报错信息导成html文件

oclint-json-compilation-database -e Pods -v -- -report-type html -o report.html -max-priority-1=9999 -max-priority-2=9999 -max-priority-3=9999

（4）其他

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